IES 2019 Annual Conference: Full Schedule

8:00am Breakfast and Networking with Leadership Forum
Share experiences and take the opportunity to voice your opinions with other EPs and IES leaders

2019 leadership forum agenda 17Jul2019 pdf

Thursday August 8, 2019 8:00am - 9:00am EDT
Commonwealth 1-3

Leadership Forum, With Emerging Professionals

8:00am EDT

IoT

Thursday August 8, 2019 8:00am - 9:00am EDT
Barley

Technical Committee Meetings

8:00am EDT

Progress Committee Meeting

Thursday August 8, 2019 8:00am - 5:00pm EDT
TBA

Committee Meeting

8:00am EDT

IES Registration Desk

Thursday August 8, 2019 8:00am - 8:00pm EDT
Olmsted Prefunction

9:00am EDT

EP & Student Introduction / Keynote Speaker

9:00am LIGHT. EFFECT | Keynote Speaker
After falling in love with a beautiful fabric shade in London, Dawn Ladd began her career in lighting as a shade maker. In the 35 years since, she has built Aurora Lampworks, a Brooklyn-based lighting restoration company that has restored fixtures for treasured landmark buildings in New York and beyond.

Thursday August 8, 2019 9:00am - 10:00am EDT
Olmsted 5-7

EPs/Students

9:00am EDT

Standards Committee Meeting

Thursday August 8, 2019 9:00am - 11:00am EDT
Charred Meeting Room

Technical Committee Meetings

9:00am EDT

IES Leadership Forum

Thursday August 8, 2019 9:00am - 3:00pm EDT
Olmsted 4

Leadership Forum

9:00am EDT

EP & Student Workshops

Thursday August 8, 2019 9:00am - 4:30pm EDT
Olmsted 5-7

EPs/Students

10:00am EDT

EP & Student Workshop - Construction Process Panel

10:00am LIGHT. AFFECT | Construction Process Panel
From the spark of an idea to the flip of the switch...learn from an expert panel about the lighting design and
construction process and the many participants in it. Potential panelists include: Owner’s
Representative, Architect, Engineer, Lighting Designer, Project Manager, General Contractor, Electrical
Contractor, Lighting Distributor, Manufacturer’s Agent (Rep), and Lighting Manufacturer.

Thursday August 8, 2019 10:00am - 12:00pm EDT
Olmsted 5-7

EPs/Students

10:00am EDT

IA Committee Meeting

Thursday August 8, 2019 10:00am - 1:00pm EDT
TBA

Committee Meeting

11:30am EDT

Chair's Lunch

Thursday August 8, 2019 11:30am - 2:00pm EDT
Olmsted 1/2

12:00pm EDT

EP & Student Lunch

EP & Student Lunch
Sponsored by IES New York City Section

Thursday August 8, 2019 12:00pm - 1:30pm EDT
Tavern on 4th

EPs/Students

1:30pm EDT

EP & Student Workshop - Fellows Introduction and Speed Networking

1:30pm Speed Networking
Take advantage of short discussions with many industry professionals and Fellows

Thursday August 8, 2019 1:30pm - 3:00pm EDT
Olmsted 5-7

EPs/Students

2:30pm EDT

LOPS

Thursday August 8, 2019 2:30pm - 4:30pm EDT
Barley

Technical Committee Meetings

2:30pm EDT

Light and Human Health

Thursday August 8, 2019 2:30pm - 5:00pm EDT
Olmsted 1/2

Technical Committee Meetings

3:00pm EDT

EP & Student Workshop - Message from IES President

3:00pm Message from the current IES President, Jennifer Jacques

Thursday August 8, 2019 3:00pm - 3:20pm EDT
Olmsted 5-7

EPs/Students

3:00pm EDT

Lighting Control Systems

Thursday August 8, 2019 3:00pm - 4:00pm EDT
Rye

Technical Committee Meetings

3:00pm EDT

Regional Membership Council (RMC) Meeting

Thursday August 8, 2019 3:00pm - 5:00pm EDT
Olmsted 3

Committee Meeting

3:30pm EDT

EP & Student Workshop - EP Town Hall

3:30pm EP Town Hall
Share your experiences with fellow EPs. Be prepared for open and honest discussion, facilitated

Thursday August 8, 2019 3:30pm - 4:30pm EDT
Olmsted 5-7

EPs/Students

5:00pm EDT

Illumination Awards Red Carpet Cocktail Reception

Thursday August 8, 2019 5:00pm - 6:00pm EDT
Commonwealth Foyer

IA Gala Events

6:00pm EDT

Illumination Awards Gala Dinner and Awards Presentation

Thursday August 8, 2019 6:00pm - 8:00pm EDT
Commonwealth 4-8

IA Gala Events

8:00pm EDT

Dessert Reception

Thursday August 8, 2019 8:00pm - 10:00pm EDT
Commonwealth 1-3

IA Gala Events

9:00pm EDT

Progress Committee Meeting

Thursday August 8, 2019 9:00pm - 11:00pm EDT
TBA

Presentation Rehearsal

7:00am EDT

Continental Breakfast

Friday August 9, 2019 7:00am - 7:30am EDT
Commonwealth Foyer

7:00am EDT

IES Fellow's Breakfast

Friday August 9, 2019 7:00am - 8:30am EDT
Butchertown

7:30am EDT

Annual Conference Welcome & State of the IES

IES Welcome & State of the IES

Friday August 9, 2019 7:30am - 8:00am EDT
Commonwealth 4-8

General Session

8:00am EDT

General Session Interview with Irina Rasputnis-International Perspective

Friday August 9, 2019 8:00am - 8:30am EDT
Commonwealth 4-8

General Session

8:00am EDT

IES Registration Desk

Friday August 9, 2019 8:00am - 5:00pm EDT
Olmsted Prefunction

8:30am EDT

General Session Keynote Presentation Neil Harbisson

Friday August 9, 2019 8:30am - 9:30am EDT
Commonwealth 4-8

General Session

9:45am EDT

Helping Communities Develop a Lighting Ordinance

Since the introduction of the International Dark Sky Association (IDA) and the Illuminating Engineering Society (IES) joint Model Lighting Ordinance (MLO) (IDA, 2011), several communities are using the MLO as the basis of their outdoor lighting ordinances. As a model, the MLO presents many choices to the communities to customize it to meet citizen’s expectations. There are also MLO exclusions and/or options that communities may want to include such as sports lighting, streetlighting, light source spectrum and electronic sign brightness (luminance). This presentation will show how the Prescriptive Method of the MLO can be expanded to include these areas, including the new IES RP-39 which describes maximum limits for electronic sign brightness. Other entities such as the California Energy Commission Title 24 Energy Code and Reach Codes, and USGBC Site Credit 8, use the MLO as a model and expand the options. This presentation will be a discussion on how to implement the MLO, and possibilities on expansion.

Speakers

Nancy Clanton

Clanton & Associates, Inc.

Nancy Clanton is CEO of Clanton & Associates, a lighting design firm specializing in sustainable and regenerative design. Nancy is a registered Professional Engineer. Nancy is a member of the National Academy of Science committee on the assessment of solid state lighting. Nancy is... Read More →

Friday August 9, 2019 9:45am - 10:15am EDT
Olmsted 5

Technical Presentation, Technical Presentation

9:45am EDT

Post-Occupancy Evaluation Studies in the Workplace: A Human-Centric Approach to Lighting

Current literature highlights the importance of human-centric lighting design interventions in the built environment that move beyond energy-centric approaches and focus on occupant satisfaction health and well-being (Rocca, 2017). A Midwest University interdisciplinary team conducts an evidence-based analysis of occupants’ satisfaction, health, and well-being in state-funded buildings and provides suggestions for improvements using the Sustainable post-occupancy evaluation survey (SPOES). SPOES identifies several indoor environmental quality (IEQ) categories that contribute to overall occupant satisfaction, health and well-being such as acoustic conditions, indoor air quality, personal adjustability, daylighting, and electric lighting. The authors present the thematic qualitative analysis of occupants (N = 2,690) in 13 workplace buildings and discuss the impact of daylighting and electric lighting on occupants’ satisfaction, health, and well-being. SPOES is an Internet-based questionnaire administered via Qualtrics between 2009 and 2017 of occupants (N = 4,205) in 43 buildings including workplaces, classrooms, and residence halls. Beside the satisfaction-Likert-scale from 1 (very dissatisfied) to 7 (very satisfied), occupants respond to open-ended questions regarding their satisfaction with daylighting and electric lighting. Overall, the open-ended responses were strongly associated with the amount and adjustability of both daylighting and electric lighting. Prominent themes were as follow. Insufficient access to daylighting and view, respondents reported the lack of natural lighting and outdoor views due to isolated office-spaces and the absence of windows. Inadequate control of electric lighting, respondents reported the automatic lighting systems failed to meet their task-specific needs (e.g. glare, harsh, shadow) while demanding excessive adjustments (e.g., large movements, continuous reoperations of sensor lights). Poor integration between daylighting and electric lighting, respondents preferred warmer color temperature lighting to fluorescent lighting and reported the amount of contrasts between daylighting and electric lighting caused eyestrains and migraines. The findings resonate well with the literature on human-centric lighting design, which reinforces the importance of daylighting accessibility, personal-adjustability of lighting conditions, and interactions between daylighting and electric lighting (Valíček, 2016; Avcı & Memikoğlu, 2017; Van Duijnhoven et al., 2017, Wong, 2017).

Speakers

Abimbola Asojo

University of Minnesota

Dr. Abimbola O. Asojo is the Associate Dean for Research, Creative Scholarship and Engagement and Professor of Interior Design at the College of Design, University of Minnesota. Her research focuses on cross-cultural design issues, African architecture, computing and design, architectural... Read More →

Friday August 9, 2019 9:45am - 10:15am EDT
Olmsted 6

Technical Presentation

9:45am EDT

An IES Recommendation for Specifying Light Source Color Rendition

This presentation will discuss an IES recommendation for IES TM-30 that has been developed by the IES Color Committee. The goal of this recommendation is to help guide practitioners in the specification of light source color rendition using IES TM-30. The goal of this presentation is to increase awareness of this newly published document and to help conference attendees better understand its contents and use. This presentation is most appropriate for the Application Track for participants with some prior knowledge of TM-30. With that being said, a brief overview of TM-30 will be provided. This presentation will be delivered by three of members the color committee who developed the recommendation.

Speakers

Tony Esposito

Tony graduated from Penn State University in 2016 with a PhD in Architectural Engineering and a minor in statistics. His dissertation explored human responses to various light spectra with strategically varied average fidelity, average gamut, and gamut shape. His research offers an... Read More →

Michael Royer

Michael Royer is a senior lighting engineer at the Pacific Northwest National Laboratory (PNNL), where he works on the U.S. Department of Energy's solid-state lighting program.He focuses on technology development issues, helping to improve product performance through research, testing... Read More →

Jason Livingston

Jason Livingston is the principal of Studio T+L, a New York based firm specializing in architectural lighting design and theatre planning and design. His current projects include lighting design of interactive multi-media experiences, corporate offices, and houses of worship, as... Read More →

Friday August 9, 2019 9:45am - 10:45am EDT
Olmsted 3

Seminar Session, Science/Technology

9:45am EDT

Bridging the Gap: An Interactive Discussion with Emerging Professionals

Five Emerging Professionals (EPs) from different regions of the United States will come together to discuss their experiences and ideas as the newest members of the lighting industry. All experience levels are invited to participate via an interactive format, which includes an opportunity for real-time anonymous audience input. Once an IES EP, and now an employer of EPs, the moderator will lead the discussion, engaging participants from both perspectives. Topics such as career expectations, design influence, and the complicated relationship with technology will be explored to provide insight into collaborating with the lighting practitioners of the future.

___________________

Draft of objectives:
1.Discuss how personal traits such as gender, age, and appearance affect working relationships of emerging professionals with clients, employers and peers, in the office and at the job site.
2.Investigate how technology booms have an effect on office dynamics, productivity, and fostering growth.
3.Examine the expectations of employers for emerging professionals, and of emerging professionals for employers and firms.
4.Consider the transition from learning to doing for those entering the workforce, and the adaptation to our complex industry.
5.Explore the ways in which emerging professionals can influence the lighting practice and promote benevolent and sustainable objectives as future leaders.

Track: Business Building

Speakers

Elizabeth Williams

Elizabeth Williams, LC is a lighting designer and project leader for Illuminart, a Division of Peter Basso Associates, based in Metro Detroit. She is in her fourth year as an Emerging Professional, and serves as EP Chair for the IES Detroit Section. Elizabeth has a Bachelor of Fine... Read More →

Julia Rapport

Julia Rapport, RID, LEED ID+C is a lighting designer for Essential Light Design Studio, an architectural lighting design and consulting firm based in Dallas, Texas. This is her second year as an IES Emerging Professional.Julia has a bachelor of Architecture from Texas Tech University... Read More →

Eby Mathew

Eby Vincent Mathew is a Lighting Designer at Syska Hennessy Group, based in New York City. He is in his second year as an Emerging Professional, and was the IES Young Professional Scholarship awardee at the IES Annual Conference 2018 in Boston. Eby has a Bachelor of Science in Electrical... Read More →

Caitlin Mulligan-Ankony

Caitlin Mulligan-Ankony, LC is a lighting representative for SCI Lighting Solutions in Los Angeles, California. Prior to moving to Los Angeles, Caitlin worked as a regional sales manager for Kirlin Lighting in Detroit, Michigan.She is in her fifth year as an Emerging Professional... Read More →

Chris Bright

Chris Bright is a lighting designer and project manager for Lighting Design Alliance based in Long Beach, California. He is in his fourth year as an Emerging Professional and is an active member in his local IES EP chapter. Chris has a Bachelor and Master of Architectural Engineering... Read More →

Brienne Willcock

Brienne Willcock is Education Coordinator for the IES, and is based in Metro Detroit. She is past-president of the IES Detroit Section, past IES Annual Conference Chair, and named an Honorary Affiliate of the American Institute of Architects. Brienne has a Bachelor of Science in Art... Read More →

Friday August 9, 2019 9:45am - 10:45am EDT
Olmsted 2

Seminar Session, Business

9:45am EDT

Designing with Luminance and Exitance

This session explores a bit of the history of approaches to design using metrics other than illuminance, some of the luminance-based criteria that already exist, as well as several studies that make the case for exitance rather than illuminance for establishing the level of lighting in an environment. It will also demonstrate tools that can help analyze and assess luminance and exitance criteria from a pragmatic standpoint, demonstrating the use of some of these tools real-time.

Speakers

Craig Bernecker

Parsons School of Design

Craig A. Bernecker, Ph.D., is currently Professor of Lighting Design and Director of the MFA Lighting Design in the School of Constructed Environments at Program at Parsons School of Design, part of the New School in New York. He is also founder of the Lighting Education Institute... Read More →

Friday August 9, 2019 9:45am - 10:45am EDT
Olmsted 1

Seminar Session, Science/Technology, Application

9:45am EDT

Impact of Advance Light Exposure on Assembly-line Workers’ Daytime Alertness and Nighttime Sleep

Resulting from long time working in assembly-line factories where some areas are in deep space or windowless, operators' chronic underexposure to daylight may lead to fatigue aggregation.The author conducted a field study to investigate whether a prior-to-work light exposure of operators could improves their work productivity and nighttime sleep.Results indicates that advance bright light exposure to improve assembly-line operators' health condition is more useful for female worker than male workers because of the gender difference.

Speakers

Siqi Ho

Chongqing University, University of Kansas

Siqi Ho is a PhD student at Chongqing University in China and a visiting student at the University of Kansas, majoring in architectural lighting with a bachelor degree of architecture. She has huge interest in human-centric lighting, cameral-aided luminous measurement, and lighting... Read More →

Friday August 9, 2019 9:45am - 10:45am EDT
Olmsted 6

Technical Presentation

9:45am EDT

The Potential of Tunable White Lighting Systems to Improve Quality of Life in Older Adults

We evaluated the potential of using Tunable White Lighting Systems (TWL) in the residential units for improving sleep quality, mood, and consequently quality of life in older adults. In this regard, TWLs were placed in the residential units of fourteen healthy older adults from two senior communities. Actigraphy and standard questionnaires were employed to measure sleep quality and mood. Results indicate the beneficial effects of using TWLs to improve sleep quality and mood in older adults.

Speakers

Nastaran Shishegar

University of Illinois at Urbana-Champaign

Nastaran Shishegar, LEED GA, WELL AP, is a Ph.D. candidate at the Illinois School of Architecture, University of Illinois at Urbana-Champaign. Her curiosity about the research domains in the broad field of sustainability and concentrates on the link that connects built environments... Read More →

Friday August 9, 2019 9:45am - 10:45am EDT
Olmsted 5

Technical Presentation

10:15am EDT

Glare Experience Room

So, you might ask, what is the IES doing about glare? Our committee on
Discomfort Glare in Outdoor Nighttime Environments Committee (DGONE)
is working on this, and would love to have you participate as a subject in this
demonstration test. Best characterized as an eyes-on Twilight Zone experience,
you will be ushered into a simulated nighttime environment to get darkadapted,
then be transported into the Night Gallery to test the full breadth of
your glare senses.

We can’t tell you exactly what you’ll see (that would ruin the surprise!), but
your results will be collected along with everyone else’s and we’ll summarize
the results at the end of the conference.

Friday August 9, 2019 10:15am - 2:45pm EDT
Crescent Hill

Demo Room

10:15am EDT

The Lighting Design Objectives (LiDOs) Experience Room

Is it time to replace horizontal illuminance requirements? Should we consider
a paradigm shift to the lighting design process - a shift that would consider a
person’s response to the visible effects of lighting in the indoor environment as
the primary importance?
By considering lighting design objectives, the modern designer can create
visual hierarchy and interest within our spaces despite restrictive energy
concerns. LiDO is that – a procedure that will put the control for interior
lighting design back into the hands of the designers; a true benefit to everyone
who lives and works indoors.

Friday August 9, 2019 10:15am - 2:45pm EDT
Nulu

Demo Room

10:15am EDT

TM-30 Experience Room

What do all three TM-30 metrics mean in real life? In the TM-30 Demo Room
visitors will experience immersive mockups illuminated with a variety of
light sources illustrating the various design intents (Fidelity, Preference, or
Vividness). These live lighting demonstrations will be paired with TM-30 values
to show how TM-30 can be used to select light sources for each intent. Visitors
will experience sources that meet different specification levels of the IES TM-
30 specification guidelines outlined in IES TM-30-18 Annex E – don’t miss this
one!

Friday August 9, 2019 10:15am - 2:45pm EDT
Clifton

Demo Room

10:45am EDT

AM Break

Friday August 9, 2019 10:45am - 11:00am EDT
Olmsted Foyer

11:00am EDT

Daylight Evaluation: The Influence of Vertical Luminance on Visual Preference in Daylit Environment

Daylighting is considered as an important architectural design approach not only because it enables reduction of energy consumption but also provides high illuminance, good color rendering to interior space, view connection with outdoors, and many other benefits. However, without careful design, daylight might also cause discomfort glare, veiling effects, and visual fatigue. In order to achieve an ideal constructed lighting environment, there are illuminance-based guidelines to evaluate and design electrically illuminated spaces. Daylight delivers higher illuminance levels to a space; thus, it is not equivalent to use the same metric to evaluate daylight environment. Recent software developments for daylight study, like DIVA, have increased access to luminance-based data, but there is still not a method to effectively relate the data to human impression of daylight environment. This paper explores daylight’s impact on human perception and how they influence visual preference in daylit environment. By studying the relationship between quantifiable data and subjective daylight qualities, this paper aims to provide a way to evaluate spaces for daylighting design.

Speakers

Craig Bernecker

Parsons School of Design

Friday August 9, 2019 11:00am - 11:15am EDT
Olmsted 5

Technical Presentation

11:00am EDT

Lighting Conditions and Perceived Learning Experience Among Students in Classroom Buildings: A Post‐Occupancy Evaluation Study

Post-occupancy evaluation studies have been recognized for documenting occupants’ well-being and responses to indoor environmental quality (IEQ) factors such as thermal, lighting, and acoustic conditions. Lighting is one of the most visible, controllable, and functional IEQ factors of the interior environment and therefore, has been found to be highly predictive of occupant satisfaction and performance. Interior spaces are impacted by the quality and quantity of lighting. Lighting contributes to human circadian rhythm, energy efficiency and building performance. Lighting is sometimes controllable by building occupants and it makes up a significant portion of the design budget. Therefore, the sustainable post-occupancy evaluation survey (SPOES) developed by a Midwest University interdisciplinary team provides an evidence-based quantitative analysis of occupants’ satisfaction. It identifies areas that are successful and those that need improvement. The SPOES questionnaire has eleven IEQ categories that impact occupant health, daylighting and electric lighting conditions are two among them.

Speakers

Abimbola Asojo

University of Minnesota

Friday August 9, 2019 11:00am - 11:15am EDT
Olmsted 6

Technical Presentation

11:00am EDT

Starving for Darkness - How Lighting Pollution Impacts Wildlife

Author: Jane Slade, MID, LC, IES - Specification Sales Manager at Speclines
Knowledge level: Suitable for all levels
Track with which the submission is best aligned: Science and/ or Lighting Design Strategies
Format: Single Speaker

This seminar discusses the impact of exterior lighting and light pollution upon wildlife, addressing complex ecological issues such as interdependency, biodiversity, circadian rhythms, feeding, pollination, and migration. Light pollution and its impact will be discussed with regard to the following plants and animals: Fireflies, Bees, Monarch Butterflies, Dung Beetles, Bats, Whales, Birds, Zooplankton, and Trees.

Learning Objectives:

1. To identify exterior lighting conditions that can be harmful to wildlife.
2. To look at existing case studies and projects that have caused harm to wildlife.
3. To understand existing lighting regulations and how these both support wildlife, and what can be done to improve existing standards.
4. To look at existing case studies and projects that have been designed for the wellbeing of wildlife habitats and the environment.

While humans may experience the impacts of light pollution such as the loss of the night’s sky and the disruption of circadian rhythms, the interruption of the natural daylight cycle impacts wildlife far more critically. For wildlife, the cycle of darkness and a connection to the map of the stars is necessary for survival. From microscopic organisms such as Zooplankton, to some of the largest organisms such as Whales, wildlife utilizes light to navigate through the world. Artificial light disorients, distracts, and fixates animals. For plants, light shifts the concept of time and season, altering flowering patterns and pollination.

The intricate balance of life on Earth depends on the presence of darkness, yet the growing proliferation of LEDs is a direct threat to this balance. Light, more than any other environmental factor, entrains behaviors of both flora and fauna. Up until the industrial revolution, light was the most reliable and precise factor of time on Earth, tuning behaviors such as reproduction and migration. While exterior light is important to human activity, lighting design must also take into account the welfare of all living things.

Design practices, innovations, controls, and awareness can all help to thwart the issue of light pollution and its impact upon the ecosystems of the Earth. Case studies of both harmful and helpful lighting designs will be discussed. Lastly, the topic of standardized lighting levels and issues around finding consensus and establishing lighting regulation will be discussed.

Speakers

Jane Slade

Jane Slade, MID, LC, IES is the Specification Sales Manager for Speclines in Massachusetts, a lighting manufacturer’s representative agency specializing in outdoor lighting for municipalities, universities, corporations, commercial developments, and transportation agencies through... Read More →

Friday August 9, 2019 11:00am - 12:00pm EDT
Olmsted 3

Seminar Session, Science/Technology

11:00am EDT

The Myth and Reality of Starting Your Own Firm

The Myth & Reality of Starting your Own Firm

Andrea Hartranft
Maureen Moran

We propose that this will be a structured Group Discussion.

We will propose questions for audience debate and engagement.

We will start with a debate style format - a series of statements regarding perceptions about business ownership will be presented and explored with Maureen and I taking sides - one arguing the myth side of the debate, the other arguing the reality side of the debate. We will generate the statements discussed from an online survey developed over social media to get as wide a cross section as possible of would be entrepreneurs. We will use statistics regarding business trends, success rates and growth rates to argue the reality side of the debate. We will also have Q&A with the audience, where we present multiple choice answers to popular questions (ie what is the number one reason a business fails) and let them vote on/discuss the answer.

We will be polling the audience.

The Learning objectives for this discussion are as follows:

1. Differentiate between myth and reality with regard to business ownership

2. Evaluate pros and cons of business ownership

3. Analyze the benefits of business ownership as an individual as well as to the light industry

4. Investigate all possible entrepreneurial options including business ownership

This presentation is appropriate for any level of knowledge but may be most interesting to those with 5 years of experience or more.

Speakers

Andrea Hartranft

Andrea Hartranft, IALD, of Hartranft Lighting Design, offers expertise gained from more than 1,000 commercial, institutional and industrial projects, including high-end public spaces, energy-efficient workplaces, and cost-driven renovations.Her projects have received international... Read More →

Maureen Moran

Maureen Moran, IES, IALD, LC, has over thirty-five years of experience as an architectural lighting designer. Since 1996, as the principal of MCLA, Maureen has led an exceptional team to create award-winning designs for a wide variety of project types. Projects include historic landmarks... Read More →

Friday August 9, 2019 11:00am - 12:00pm EDT
Olmsted 2

Seminar Session, Business

11:00am EDT

To Light, or Not to Light: Developing Lighting Concepts

Lighting layouts are not the same as lighting design.
Quality lighting design begins with concept development - a form of programming for the visual environment that considers many elements such as perception, contrast, and visibility. But where do you start? Where does the lighting concept come from?
This seminar is a fun and timeless tour of lighting design for beginners and even the seasoned professional. Taking you through case studies of various diverse projects, the seminar addresses those essential steps to create the desired mood, atmosphere, and functionality. The case studies span different sectors and identify the range of challenges that good design can help overcome, with many universal lessons.
At the end of the seminar, attendees will:
1. understand the value of “lighting with intention”,
2. recognize how project challenges and goals guide the development of a lighting design,
3. appreciate the challenges and opportunities that lighting controls present, and
4. see how designers can deeply affect perception through lighted effects.

Speakers

Deborah Gottesman

Deborah Gottesman’s experience includes consulting engineering, energy management, manufacturing, teaching, training, and design. She founded Gottesman Associates in 1999 with the intent to provide lighting intelligence and advanced design solutions, tailor made to each project... Read More →

Friday August 9, 2019 11:00am - 12:00pm EDT
Olmsted 3

Seminar Session, Art/Design

11:00am EDT

Assessing Connected Lighting Systems and a Proposed Methodology for Assessing Daylight Harvesting

For the last two years, The Next Generation Lighting Systems program has been assessing the actual installation, commissioning, and performance of “easy to install” connected lighting systems. This presentation reports on the observed and measured lighting and control performance, as well as user operation of the controls. It focuses on the difficulty of assessing daylight dimming performance and suggests a methodology to better determine the performance of this aspect of the systems.
Using evaluation notes, illuminance and luminance measurements, and “action” photography, and video clips, the presentation discusses lessons learned – and what still needs to be addressed with such systems.

Speakers

Ruth Taylor

Pacific Northwest National Laboratory

Ruth Taylor currently serves as a program manager on the Advanced Lighting Team at Pacific Northwest National Laboratory where she contributes to several projects focused on the application and development of solid-state lighting. Currently, Ms. Taylor manages the Next Generation... Read More →

Craig Bernecker

Parsons School of Design

Friday August 9, 2019 11:00am - 12:00pm EDT
Olmsted 5

Technical Presentation

11:00am EDT

Evaluating Tunable Lighting in Classrooms

The proposed presentation will provide a brief description of the white-tunable LED lighting system installed in the three FCUSD elementary school classrooms before focusing on the specific results gathered from several monitoring procedures implemented in those classrooms during the 2017-2018 school year

Speakers

Sarah Safranek

Pacific Northwest National Laboratory

Sarah Safranek is a Lighting Research Engineer at Pacific Northwest National Laboratory. Her current research is focused on a range of technology and application topics surrounding advanced lighting systems in support of the U.S. Department of Energy Solid-State Lighting program... Read More →

Robert Davis

Pacific Northwest National Laboratory

Bob Davis is a Senior Staff Lighting Engineer at Pacific Northwest National Laboratory, where his responsibilities include serving as Technical Director of the Solid-State Lighting program and leading several human factors research efforts. He has been a faculty member in architecture... Read More →

Friday August 9, 2019 11:00am - 12:00pm EDT
Olmsted 6

Technical Presentation

12:15pm EDT

Luncheon - Society Awards/ ILC / IES2020 Vision- The New Era

Friday August 9, 2019 12:15pm - 2:00pm EDT
Commonwealth 4-8

Luncheon, With Society Awards

2:15pm EDT

Circadian Light Measurement in a Hospital Room with the Aid of High Dynamic Range Imaging Technology

The discovery of a third photoreceptor on human eyes’ retina called Intrinsically Photosensitive Retinal Ganglion Cells (ipRGC) has introduced another dimension into lighting practice. With this discovery, lighting assessment is concerned with the measurement of not only light for visual perception but also circadian light due to its effect on human health and wellness. The purpose of this research was to integrate light meters with high dynamic range (HDR) photography to measure and present the distribution of Equivalent Melanopic Lux (EML) within the field of view of space users. A Canon camera EOS 550D fitted with a Sigma 4.5mm F2.8 EX DC HSM circular fisheye lens was used to measure the light perceived by a patient in a hospital room. The camera was mounted at the position as the patient’s eyes and aimed at four different viewing directions (looking forward, up, toward window, and toward the door). A spectrometer was also used at each measurement to record the spectral power distribution of light exposure in front of the camera lens. EML values received at the camera lens were then calculated and compared with the required EML value as of minimum 200 lx recommended by the WELL building standard to evaluate the lighting condition of the space perceived at the patient’s eye position. Per-pixel luminance, illuminance, and EML maps were also presented to help visually understand the distribution of each metric within the field of view of the space users.

Speakers

Farzaneh Mahlab

University of Kansas

Farzaneh is a Ph.D. Candidate in Architectural engineering with a focus on lighting design at the University of Kansas. She has been working as a graduate research assistant and her research focuses on expanding the capability of high dynamic range imaging technology to measure photometric... Read More →

Hongyi Cai

University of Kansas

Dr. Cai is an Associate Professor in the Department of Civil, Environmental, and Architectural Engineering (CEAE) at the University of Kansas.

Friday August 9, 2019 2:15pm - 2:30pm EDT
Olmsted 5

Technical Presentation

2:15pm EDT

Is It Time to Change How We Talk About Light?

One way or another, everyone in the lighting industry would agree that the biggest problem that we face today is the perception of light and its importance in our life. Either it’s a professional or end user, in many cases, light is taken for granted. Every day, we find ourselves explaining to a new person why he/she should care. One might argue that educating the client is part of our job anyway. But the question for me: Is there a way of doing this collectively all together? If so, what needs to be changed?
There is already an unconscious collective effort defined by the industry. The marketing minds within the industry are working relentlessly to add new meanings to light, new arguments to discuss, new offerings to convince the client. Often, that ends up having a "slogan" to describe what light can do. There is always an additional value defined by the industry to "sell" light. And that quickly becomes the norm for many lighting professionals including lighting designers how we talk about the importance of light. These messages, accumulated, creates an unrealistic - problematic image of light and why it matters for us. We end up having "light" associated with energy efficiency or sustainability or the internet of things. But at what cost?
It’s been 70 years since Richard Kelly called himself an architectural lighting designer and the profession is growing since. But is it fast enough? Can we do something about it?
I propose to look at how we, lighting professionals, talk about light and what can/should be changed to create a greater awareness of lighting design value? By talking differently about light, can we change the perception of the profession? Because just like Kenneth Wapnick said once: “Miracles are a shift in perception.” Can we help the shift to happen?

Speakers

Emre Güneş

Emre Güneş (Linkedin: https://www.linkedin.com/in/emregunes/)Lighting Design Advocate. Formerly an industrial engineer, he lives and breathes lighting design.By a series of coincidences, he started publishing the only architectural lighting design magazine in Turkey back in 2005... Read More →

Friday August 9, 2019 2:15pm - 3:15pm EDT
Olmsted 3

Seminar Session, Art/Design, Business

2:15pm EDT

Let's Talk DMX, Baby! Let's Talk About RGB!: Introduction to DMX Controls for Commercial and Residential Applications

Despite the fact that DMX technology has been around since the 1980s, many people still consider it to be too complex to use with modern lighting systems.

In reality, DMX can be an incredibly useful tool in both residential and commercial applications, and once you get the hang of it you'll find that it isn’t as challenging as it might seem!

Speakers

Caye Piper

Caye Piper is the Technical Sales Engineer and Project Manager at Elemental LED. She holds a degree in Electrical Science from Laney College as well as an LC certification. She is the current President of the Reno IES Section and has held several training sessions in Reno, NV on... Read More →

Friday August 9, 2019 2:15pm - 3:15pm EDT
Olmsted 1

Seminar Session, Application

2:15pm EDT

Speed Art Museum: Perspective from the Inside/Out

Less than 2.5 miles from the IES Annual Conference is the Speed Art Museum. Its 2017 $50 renovation is a tale familiar to many: the museum was ready for an LED upgrade but uncertain on the final fixture selection. The project itself too included common lighting challenges. It was a quest for a cohesive design, despite the space’s varying functions, ceiling heights, amounts of daylight, and objects illuminated.
But for all its familiarities, the Speed Art Museum is unique because it is presented by less familiar perspectives. The museum and manufacturer present this case study, offering their experiences from start to finish.
The perspective of the Speed Art Museum is offered by Scott Erbes, Curator of Decorative Arts and Design. Scott shares the museum’s original lighting system, the motivation to transition to LEDs, and their initial research. Scott offers lessons from his role through fixture selection, installation, and continuous adjustments.
The perspective of the manufacturer is offered by Richard Shaver, Executive Vice President of R&D. Richard shares his involvement with the project, including multiple site visits. Richard offers best practices when working with museums, specifically which questions to ask regarding usage needs, timeline, budget, and in-the-field adjustments.
The Speed Art Museum presented many lighting challenges: a triple-height atrium; vast open layouts; multi-use gallery/event spaces; glass ceiling panels, and so on. The museum and manufacturer came together to overcome such challenges, and are here to report back.

Speakers

Richard Shaver

After studying lighting in the Architectural Engineering program at Penn State University, Rick established a lighting design practice in 1977 that continues uninterrupted to this day. For the past four decades he has additionally been the head of Research and Development at Edison... Read More →

Scott Erbes

A graduate of the Winterthur Program in American Material Culture, Scott began his career in 1990 at the Nelson-Atkins Museum of Art in Kansas City.He joined the Speed Art museum in 1999 as the museum’s first curator of decorative arts and design for a collection that ranges from... Read More →

Friday August 9, 2019 2:15pm - 3:15pm EDT
Olmsted 2

Seminar Session, Application

2:15pm EDT

LED Drivers and IoT

LED drivers are the fundamental component that supports LED lighting and IoT Lighting systems. LED drivers are more flexible than fluorescent or HID ballasts because they can be easily programmed to operate different LED loads, light levels, and Color Coordinated Temperatures (CCT). Energy efficiency is a critical consideration. This paper discusses LED driver's innovative operation modes and functionality. The authors discuss the American National Standards Institute C82 committee research that resulted in the world's first energy efficacy test method for programable drivers.

Speakers

Howard Wolfman

Lumispec Consulting

BSEE from the University of Illinois, MBA from Northwestern University, PE Illinois. After leading engineering, manufacturing, and marketing functions in diverse product areas for years, for the last 11 years, he has been the principal of Lumispec Consulting, specializing in Lighting... Read More →

Ernesto Mendoza

Signify

Friday August 9, 2019 2:15pm - 3:15pm EDT
Olmsted 6

Technical Presentation

2:15pm EDT

Lighting Systems Cybersecurity Standards

The authors present a cybersecurity standard innovation; the first ever American National Standard Institute (ANSI) Lighting Systems cybersecurity standard. This document has been constructed around a parking lot use case. This paper highlights the parallels among the ANSI lighting systems cybersecurity standard and the United States National Institute of Standards and technology (NIST) Information Technology Laboratory Industrial Controls cybersecurity document SP 800-82. The speakers will talk about other possible approaches like the International Electrotechnical Institute (IEC) 62443 suite of security standards and its relevance to lighting systems.

Speakers

Richard Haring

Signify

Ernesto Mendoza

Signify

Friday August 9, 2019 2:15pm - 3:15pm EDT
Olmsted 6

Technical Presentation

2:15pm EDT

Potential energy effects of meeting lighting recommendations for affecting human health

Several recent documents provide guidance on lighting for human health considerations.This presentation summarizes a series of investigations into the possible energy implications of meeting the requirements in these documents.

Speakers

Sarah Safranek

Pacific Northwest National Laboratory

Robert Davis

Pacific Northwest National Laboratory

Jessica Collier

Pacific Northwest National Laboratory

Jessica joined the Advanced Lighting team at PNNL in March 2019 as a Post Masters Research Associate. Her current research is focused on emerging SSL technologies, their associated metrics and suitable applications. Prior to joining PNNL, Jessica worked as a lighting designer in New... Read More →

Friday August 9, 2019 2:15pm - 3:15pm EDT
Olmsted 5

Technical Presentation

3:30pm EDT

IES Progress Report

Friday August 9, 2019 3:30pm - 5:00pm EDT
Commonwealth 4-8

IES Progress Report

4:30pm EDT

District Executive Council Meeting (DEC) - Districts 3 and 4 (Joint Meeting)

Friday August 9, 2019 4:30pm - 6:00pm EDT
Olmsted 4

Committee Meeting

5:00pm EDT

District Executive Council Meeting (DEC) - District 2

Friday August 9, 2019 5:00pm - 7:00pm EDT
Oak

Committee Meeting

5:45pm EDT

Catch your bus to Churchill Downs

Friday August 9, 2019 5:45pm - 6:30pm EDT
Lobby

6:30pm EDT

Tabletop & Poster Presentation Reception

Friday August 9, 2019 6:30pm - 8:00pm EDT
Churchill Downs

8:00pm EDT

Dinner-Sponsored by Eaton

Friday August 9, 2019 8:00pm - 10:30pm EDT
Churchill Downs

7:00am EDT

Wild Walk

Saturday August 10, 2019 7:00am - 7:45am EDT
Lobby

7:15am EDT

Continental Breakfast

Saturday August 10, 2019 7:15am - 7:45am EDT
Commonwealth Foyer

8:00am EDT

General Session Interview with Jim Brodrick

Saturday August 10, 2019 8:00am - 8:45am EDT
Commonwealth 4-8

General Session

8:00am EDT

IES Registration Desk

Saturday August 10, 2019 8:00am - 5:00pm EDT
Olmsted Prefunction

9:00am EDT

IoT Lighting (Panel)

Panel will present data from two field evaluations of cybersecure lighting controls that also interface with the HVAC system, with programming for circadian stimulus and with software that provides real time data on space utilization

Speakers

Michael Myer

Michael Myer has worked for Pacific Northwest National Laboratory for more than 10 years.Michael primarily supports the Department of Energy in his work. Both regulatory and voluntary market transformation work is included in Michael’s portfolio. Within the regulatory field, Michael... Read More →

Kevin Powell

KEVIN M. POWELL is the Director of Emerging Technologies for the General Services Administration’s Public Buildings Service (PBS), and program director for the GSA Proving Ground (GPG). Mr. Powell focuses on identifying innovative technologies, practices and process that optimize... Read More →

Katy Boat

Katy Boat is an Electrical Engineer and Lighting Designer in the Chicago office of SmithGroup, an architecture, engineering, planning and design firm.She has experience on new construction, renovation, and tenant improvement projects, focusing her attention in the healthcare, higher... Read More →

Saturday August 10, 2019 9:00am - 10:00am EDT
Olmsted 2

Seminar Session, Application

9:00am EDT

LEDs, Glare, Metrics: We're Getting Closer

Discomfort glare has been the intractable bugaboo of lighting for decades. Whether it’s interior or exterior lighting, we’ve all sensed that LEDs can be worse than conventional lighting. Why? This talk will address what has been learned about luminance distribution across luminaire apertures, how and why edges and SPD affect glare perception, and how glare metrics are being modified to be better predictors. This talk will include a demonstration of pairs of luminaires, developed through the IES DGONE Committee work, that have identical lumen output and candela distribution, yet produce very different glare responses. It will also reinforce why totally uniform light distributions may not be the answer.
This topic is a prominent issue for specifiers and manufacturers. How do we improve products so that LEDs are not automatically associated with discomfort glare? Yes, there are tradeoffs between efficacy and ideal light distribution. Is there a happy medium between stellar efficacy and visual comfort?
The work of the CIE Joint Technical Committee 7 will be addressed, an international effort to improve UGR as a predictive metric for discomfort glare. Also included will be the work of the IES DGONE Committee, focusing effort into glare metrics for outdoor applications. The presentation will also call upon the work performed at Pacific Northwest National Laboratory in examining high-efficacy industrial products, as well as an experimental investigation into how position in the visual field, source size, source SPD, and background luminance affect the glare response.

Speakers

Naomi Miller

Naomi Miller straddles the line between design and engineering at the Pacific Northwest National Laboratory in Portland OR. By bridging the gap between technology and application, she promotes the wise use of LEDs, working with industry to overcome hurdles and celebrate the opportunities.She... Read More →

Saturday August 10, 2019 9:00am - 10:00am EDT
Olmsted 1

Seminar Session, Science/Technology, Application

9:00am EDT

The Power of Routine

Over the past 4 years, SMUD has completed several commercial and residential circadian lighting projects and has seen a common thread: the power of cuing for routines. This workshop will cover how circadian lighting can benefit the health and daily lives of individuals but will focus primarily on how correlated color temperature changes throughout the day can create beneficial routines in the lives of seniors, children and everyone in between.

Speakers

Connie Samla

Connie Samla is SMUD’s Lighting Specialist with over twenty-five years of experience in lighting design. She teaches and coordinates educational workshops and works on R&D projects for new technologies including circadian lighting. Connie has taught lighting design at California... Read More →

Dave Bisbee

Dave Bisbee is a Certified Energy Manager (CEM) with nearly thirty years of experience in the energy industry working with commercial, residential, and public-sector customers.Dave has served as a Project Manager for SMUD’s Customer Advanced Technologies (CAT) program for the past... Read More →

Saturday August 10, 2019 9:00am - 10:00am EDT
Olmsted 3

Seminar Session, Science/Technology

9:00am EDT

A comparison between IES TM-30 and CRI-based color rendition properties

The color rendition properties described in IES TM-30-18 “IES Method for Evaluating Light Source Color Rendition” have been compared with those described in the publication of the Global Lighting Association (GLA) “Application of CIE 13.3-1995 with Associated CRI-based Colour Rendition Properties”. Subsequently, the correlation between color rendition properties and subjective ratings, for four user studies, was determined to explore the relevance of the individual color rendition properties. For the 62 spectra used in the four studies, it was found that the coefficient of determination for the color gamut indices (Rg and Ga), the red chroma shifts (Rcs,h1 and C9) and for the red color rendering indices (Rf,h1 and R9) was always very high: R2 > 0.94. The coefficient of determination for the average fidelity indices (Rf and Ra) was slightly lower: R2 = 0.84. When relating the color rendition properties with user ratings, it appeared that differences in attractiveness of fruit and packaging materials can mainly be explained with the gamut-based and red chroma indices. For the attractiveness of skin tones the relation with the index values is less obvious. Colorfulness ratings are mainly influenced by the gamut-based indices, but also in some cases by the red chroma indices. Finally, naturalness ratings for fruit are highly correlated with the average fidelity values, but this relation between naturalness and average fidelity has not been found for the other study. The red fidelity indices do not explain much of the variation in the user ratings. As expected, the relation between user ratings and index values is influenced by the question asked, but also by application and CCT. Because the TM-30 and CRI-based indices for fidelity, color gamut and red chroma are highly correlated, both methods could be used to provide a more complete description of the color rendition properties of white-light sources. For instance, Ra could be used to guarantee a minimum fidelity (e.g. Ra ≥ 70 for indoor applications), whereas Ga, and C9, could be used to show the trade-off between energy efficiency and attractiveness or naturalness of rendered objects.

Speakers

Kees Teunissen

Signify Research, Southeast University, Nanjing

Kees Teunissen is a senior scientist at Signify Research, the Netherlands, and a visiting professor at Southeast University, Nanjing, China. He holds a doctoral degree in psychophysics from Delft University of Technology, the Netherlands. In 1987, he joined Philips Research and worked... Read More →

Saturday August 10, 2019 9:00am - 10:00am EDT
Olmsted 5

Technical Presentation

9:00am EDT

An Integrated Daylighting Design Process

This paper explores the daylighting design strategies, methods, and tools used by Brad Cloepfil of
Allied Works Architecture at the Clyfford Still Museum in Denver, Colorado. The author
interviewed Brad Cloepfil and Chelsea Grassinger of Allied Works and Christopher Rush of Arup
New York to assess design intentions, strategies, processes, and the diverse daylighting design
methods and tools used to integrate the poetic and practical dimensions of daylighting design. The
case study reveals the diverse processes and methods used by the design team to work back and forth
between exploratory methods such as drawing, diagramming and physical study models;
performance based analysis and calculations; and spatial and atmospheric renderings and
visualizations. Design processes, methods and tools that integrate qualitative and quantitative design
issues are key to the successful realization of daylighting in architectural design.

Speakers

Mary Guzowski

University of Minnesota

Mary Guzowski is a Professor in the School of Architecture at the University of Minnesota where she teaches and conducts research related to daylighting and sustainable design. She is the author of several books, including her new publication entitled The Art of Architectural Daylighting... Read More →

Saturday August 10, 2019 9:00am - 10:00am EDT
Olmsted 6

Technical Presentation

9:00am EDT

THE IMPACT OF LIGHTING AND VIEWS ON HUMAN FUNCTIONALITY IN THE WORKPLACE

The provision of controllable daylight and views can provide significant benefits to both employers and employees. Daylit spaces, appropriately designed and controlled, can meet the occupants’ visual and thermal needs and reduce energy consumption. Furthermore, daylit spaces have been shown to influence several mechanisms that impact human health and improve overall environmental quality, positively impacting job satisfaction, productivity, employee retention, and recruitment. Office work has largely transitioned from paper tasks on a horizontal work plane to a combination of horizontal and vertical tasks dominated by mobile, self-illuminated screens, requiring increased flexibility and adaptability of the visual environment. Occupants value controllable daylight and views and prioritize them over other amenities. If current trends hold, the demand for daylight, views, and personal controls will only increase, and design solutions that integrate natural elements with intuitive control and automation technology will be highly favored.

This presentation reviews the published literature that supports these assertions, including peer-reviewed journal articles, public and industry funded research, and large surveys of employees. Recent findings regarding the influence of daylight and views on health, well-being, and cognitive performance are discussed along with the associated organizational impacts.

Speakers

Paul Ward

University of Oregon

Paul Ward has a Master of Science in Engineering from Texas A&M and a Master of Architecture from the University of Oregon. His background is in computational simulations of fluid dynamics, but his work at UO has focused on providing design assistance to local architects and coordinating... Read More →

Saturday August 10, 2019 9:00am - 10:00am EDT
Olmsted 6

Technical Presentation

9:30am EDT

Prime color wavelengths and light source error score

In 2017, Esposito and Houser [2017] demonstrated that color fidelity and gamut area could not predict the color discrimination ability (measured with the Farnsworth-Munsell 100 Hue test) of light sources over a wide range of spectral power distributions. They demonstrated, in a post hoc analysis, that many light sources that produced large average error scores also introduced hue juxtapositions of the caps of the FM-100 test. They developed the Total Light Source Error score, Rd, that is a measure of the number of hue transpositions of the FM-100 hue test that a source causes. Rd could strongly predict participant error scores and showed strong face validity. In addition, they demonstrated that increasing gamut does not imply and increase in color discrimination ability; instead, increasing gamut area may actually cause worse color discrimination.

This presentation will focus on a paper whose main goal was to evaluate the color discrimination ability of spectra about Thornton’s PC (450, 530, and 610 nm) and anti-PC (490 and 570 nm) wavelengths using Rd [Esposito and Houser 2017] as a measure of color discrimination performance. Generated three-component spectral power distributions—with radiation strategically placed about the PC and anti-PC wavelengths—were used for comparative analysis. Spectral width (full-width half-maximum) of the primaries was also included as an independent variable. This work, which uses trichromatic SPDs, serves as a baseline for future computational work considering spectra with more than three structural components.

This results show that, for a three-component spectral power distribution, locating radiation about Thornton’s prime color wavelengths will reduce the Total Light Source Error Score (Rd), compared to locating the radiation about the anti-prime color wavelengths —though the difference decreases as the spectral width of the SPD’s primaries increases. Doing so is also more efficient for maximizing average gamut area, reconfirming Thornton’s original observation using a modern measure of gamut area (i.e. IES TM-30-18 Rg). Importantly, maximizing average gamut area is deleterious to color discrimination as measured by Rd. To most efficiently maximize color discrimination (minimize Rd) for a three-component SPD, locate the radiation about the PC wavelengths and maximize the FWHM of the primaries. Coincidentally, this also maximizes average fidelity (e.g. IES TM-30-18 Rf).

Speakers

Tony Esposito

Saturday August 10, 2019 9:30am - 10:00am EDT
Olmsted 5

Technical Presentation

10:00am EDT

AM Break

Saturday August 10, 2019 10:00am - 10:15am EDT
Olmsted Foyer

10:15am EDT

Deep Data in Enterprise Portfolios

The coined IOT acronym has given rise to a myriad of products flooding the market. The actual application of these technologies, however, has been a convoluted topic within building infrastructure. Commercial campuses and buildings today are a combination of many subsystems all working traditionally in relative autonomy. This emergence of IOT technology and subsequent marketing has followed this same autonomous path with trades each competing to claim themselves as the all-or-nothing solution to IoT in commercial structures. Much of this has been misguided, however. Technology is only valuable when tangible outcomes are evident from the solution provided. Greater outcomes, being the key, can be achieved using these new technological advances but only when leveraged across multiple ecosystems within the infrastructure using open standard frameworks given to us by the I.T. space.
Given to us by the principles founded in LEED, Synergy within buildings can now be accomplished through these frameworks from data provided by multiple trades working together to lower capital expenditures; increasing technological services within a commercial facility; and simplify O+M over the life cycle of a facility. Open architecture lighting solutions play a pivotal role in data collection in this philosophy.
This synergistic building philosophy is not without struggles attributed to many factors in modern day design and construction, but the design/deployment rate is increasing, driven by an organic drive out of enterprise portfolio owners and operators. The primary learning objectives include:
- Define a Synergistic Building System and how it differs from building management systems and individual control solution (lighting, HVAC, security, etc).
- Discuss the practical definition of IoT in the constructed world and the idea of a sensory network of players in a building enterprise.
- Define Hot data (compared to cold data), and how it relates to a building’s ROI story, and the advantages beyond just simple payback stories - including what is organically driving this shift by end users.
- Recognize a ‘framework’ and how it differentiates from a ‘system’, and what advantages a layer such as this plays to the greater core business of a property owner, operator, tenant, and occupant. (Including a case study)
- Discuss where lighting solutions fit, and where they don’t work within a framework and explore the current market conditions surrounding the practical deployment of IoT technology within the field in North America.

Speakers

Michael Skurla

Mike has spent 22+ years in the building automation and analytics with a long background in product development. He has a strong specialty in electrical power distribution pertaining to lighting, HVAC, EMS, and larger building automation. A particular area of focus through his career... Read More →

Saturday August 10, 2019 10:15am - 11:15am EDT
Olmsted 3

Seminar Session, Science/Technology

10:15am EDT

New Developments in Phosphor Converted Color LEDs: Application Advantages and Challenges

•Summary: RGB has been a staple of architectural and entertainment lighting for decades. When pressed into service in more general illumination applications, however, traditional RGB falls short of providing acceptable (let alone exceptional) white color fidelity. Four, five and even six channel systems adding in one or more white points, phosphor amber, or phosphor green have been used to bridge that gap with varying amounts of success in exchange for added complexity and cost. With the advent of advanced phosphor systems, Quantum Dots and ever more efficient LED chips, new opportunities will start to become available over the coming years to create highly versatile systems that have the ability to provide the wide gamut necessary to enable the most striking architainment designs, but also provide even exceptional white color rendering across a wide range of CCTs. Simulations of technical solutions based on current and projected SPDs of phosphor converted colors will be presented, along with performance and application limitations. Furthermore, expanded application spaces such as light for mood, health and well-being will be briefly explored as the result of this technology.
•Why this research or application is of interest to the IES Conference attendees: This application should be of interest to IES Conference attendees because it represents a potential sea change in one of the core technologies used for architectural lighting. It has the potential to provide higher performance and expanded applications for traditional RGB and RGBX systems.
•Methods: Simulation, and a brief overview of academic/scientific research
•Data: simulations of different LED technologies for addressing desired use cases.
•Findings: Advances in LED technology will open new performance possibilities and use cases for RGB and RGBX systems.
•Knowledge level for which the submission is appropriate: requires some prior knowledge/experience with the subject
•Track with which the submission is best aligned: science/application
•Format: single speaker

Speakers

Paul Pickard

Paul Pickard is a 21-year veteran of the lighting industry, having held technical leadership positions at Acuity Brands, LED Lighting Fixtures, Cree, and is currently CTO at Ecosense Lighting. He has provided technical leadership for a number of industry-first products, including... Read More →

Saturday August 10, 2019 10:15am - 11:15am EDT
Olmsted 1

Seminar Session, Science/Technology

10:15am EDT

Using Light to Stay Healthy in an Urban Environment

People are more aware of the concept of Food as Medicine than ever before. In a related way, the understanding of Light as Medicine or at least light as a component to maintain health is becoming more popular.
As people become more aware of the benefits of light, the demand for quality of light as a combination of daylight and electric light will increase. We are building more density into our urban cores and as a result, access to daylight will change over time for city dwellers. What happens to our quality of light when a new high rise is built across the street from our high-rise abode? Will it have a negative impact on health? Are you entitled to a minimum quality of light? How do we quantify the effect? Should this impact be part of an environmental assessment prior to permits being issued? The WELL Standard has settled on EML but is it the right one?
Equivalent melanopic Lux (EML) and Circadian Stimulus (CS) are being proposed as methods of measurement of light for its effect on our non-visual, circadian system. The industry has not yet selected a standard so we will look at both in the context of an existing high-rise residential complex and a proposed neighboring new complex. In a case study, we’ll see what the existing conditions are, how they are impacted by the proposed new conditions and what it would take for electric lighting to make up the difference.

Speakers

Denise Fong

Denise Fong has more than 30 years of experience in specialized lighting design.Recognized by her professional peers with numerous design achievement awards, she is highly skilled in developing high quality, energy efficient lighting systems for a wide variety of project types.A national... Read More →

Saturday August 10, 2019 10:15am - 11:15am EDT
Olmsted 2

Seminar Session, Science/Technology

10:15am EDT

Applying Five-Phase Daylight Analysis in Parametric Simulations to Inform Early Stage Daylighting Design

This presentation will provide an overview of the Radiance software's new five-phase daylight simulation approach, and describe how it was applied to simulate a large number of parametric modeling conditions using Grasshopper, Colibri, and Honeybee[+] in the development of a design space to better inform early stage daylighting design decisions. Results include data on time savings and the numerical model simulation results in comparison to those obtained from more conventional annual daylighting calculations conducted with Radiance, as well as the potential benefits that can be derived from this approach to daylight simulation and large daylighting performance datasets that it can generate.

Speakers

Richard Mistrick

Penn State University

Richard Mistrick is an associate professor of Architectural Engineering at Penn State University where he teaches and conducts research in the areas of lighting and daylighting systems modeling.

Saturday August 10, 2019 10:15am - 11:15am EDT
Olmsted 5

Technical Presentation

10:15am EDT

Evaluating Mean Room Surface Exitance

Although today’s lighting design practices are moving from merely considering visual performance to taking into account perception of brightness and the overall lit appearance of the space, the most widely used metric for evaluation remains one that focuses only on the former, horizontal illuminance. Illuminance as a metric is a remnant of a time when visual performance was the primary criteria in the design of the lighting in spaces and tasks did not involve self-luminous screens often leading to high levels of illumination. Currently, aesthetics and visual interest play just as important a role in lighting design. And with the rise of technology and the predominant use of the computer in the work environment, there no longer is a need for the same levels of illumination as were required in the past.

While illuminance is still extensively used, there is a collective awareness of the deficiencies of it as a metric as evidenced by studies and papers written as far back as the 1950’s. The fault lies in the fact that the metric describes the luminous flux incident on a surface. This, however, is not how humans experience light. We see light as it is reflected from a surface into our eyes. Thus, surface properties and reflectances are an important factor in the design of the lit environment.

Metrics and design methods more closely related to how we perceive light have been previously explored including the designed appearance method and luminance, yet none have been fully adopted into practice. Recently, a method was developed by Christopher Cuttle employing luminous exitance as the principal metric to assess adequacy of illumination and appearance. Mean room surface exitance (MRSE) is a measure of the overall density of luminous flux reflected off all surfaces in a space. This paired with the concept of perceived adequacy of illumination (PAI), which is the quantity of light in a space that is subjectively judged as sufficiently bright or adequate for the task carried out in the space, is the central metric in this new methodology.

A second metric was proposed by Cuttle along with MRSE. Target / ambient illuminance ratio (TAIR) is a ratio of illumination at a point of emphasis to general illumination. With this metric, Cuttle proposes the creation of illumination hierarchies in design to create visual interest within spaces. TAIR paired with MRSE allows the designer to produce non-uniform light schemes with highlights on important room surfaces.

While this new methodology has been generally well received and previous tests have proven the superiority of MRSE over illuminance before the concept can be adopted into industry standards the idea must be tested against the reality of modern lighting design. The objective of this study is to assess the relationship of MRSE to PAI and spatial brightness in non-uniform schemes employing the concept of TAIR to emphasize a specific room surface within each scene.

Speakers

Aldo Jacques Espina

Aldo Jacques Espina holds a bachelor’s degree in architecture from the University of SanCarlos in Cebu, Philippines. He decided to pursue a master’s degree in Lighting Design at theParsons School of Design after noticing the lack of lighting designers in the Philippines. He is... Read More →

Saturday August 10, 2019 10:15am - 11:15am EDT
Olmsted 6

Technical Presentation

10:15am EDT

Feasibility of employing a daylight-coefficient based approach for faster glare prediction from simulations

Daylighting simulations are an integral part of contemporary building design practice. The results from such simulations provide numerical estimates for daylight sufficiency and glare probability. Calculation of glare metrics that correlate closely with human perception of visual discomfort require the generation and analysis of High Dynamic Range (HDR) images. At present, calculation of annual hourly glare metrics through HDR images is impractical as the process of image-generation. This research investigates the suitability of HDR images generated through a daylight-coefficient based approach for estimating glare. The authors provide a high-level overview of the methodology and principle involved in generating HDR images through the daylight coefficient method and then compare the accuracy and computational runtimes of this method with conventional raytracing. As per the case study presented in this paper, HDR images generated through the daylight coefficient approach yield values of Daylight Glare Probability (DGP) that were similar to those obtained through conventionally raytraced images. For generating a year’s worth of hourly HDR images, the daylight coefficient approach was also found to be nearly 72% faster than conventional raytracing.

Speakers

Richard Mistrick

Penn State University

Richard Mistrick is an associate professor of Architectural Engineering at Penn State University where he teaches and conducts research in the areas of lighting and daylighting systems modeling.

Saturday August 10, 2019 10:15am - 11:15am EDT
Olmsted 5

Technical Presentation

10:15am EDT

Using Luminance to Supplement Current Illuminance-Based Design Codes for Design of Efficient Luminous Environments

Traditional lighting design methods are reliable but not always consistent with visual perception of space users. These methods revolve around illuminance, the amount of light falling on a surface or object, and illuminance-based metrics which are not true indicators of visual perception or visual performance. Luminance, the amount of light reflected from or transmitted through an object, is a direct stimulus of vision making it a much more appropriate metric for assessing human-light interactions. In need is a supplemental design method using luminance in conjunction with current illuminance-based lighting design methods to achieve a more individual-oriented, perception-based lighting design method. To that end, this paper introduces the aid of computer simulated design and High Dynamic Range (HDR) imaging technologies in the development of perception-based lighting design. This transformative lighting design method has the potential to increase occupant satisfaction of the luminous environment when compared to traditional illuminance-based lighting design.

Speakers

Hongyi Cai

University of Kansas

Dr. Cai is an Associate Professor in the Department of Civil, Environmental, and Architectural Engineering (CEAE) at the University of Kansas.

Erin Mahoney

AE Design

Erin Mahoney is a project designer with AE Design in Denver, CO. She received both her B.S. and M.S. degrees in Architectural Engineering from the University of Kansas. Her research explored a supplemental, luminance-based lighting design method.

Saturday August 10, 2019 10:15am - 11:15am EDT
Olmsted 6

Technical Presentation

10:15am EDT

Glare Experience Room

Saturday August 10, 2019 10:15am - 2:45pm EDT
Crescent Hill

Demo Room

10:15am EDT

The Lighting Experience Objectives (LiDOs) Experience Room

Is it time to replace horizontal illuminance requirements? Should we consider
a paradigm shift to the lighting design process - a shift that would consider a
person’s response to the visible effects of lighting in the indoor environment as
the primary importance?

By considering lighting design objectives, the modern designer can create
visual hierarchy and interest within our spaces despite restrictive energy
concerns. LiDO is that – a procedure that will put the control for interior
lighting design back into the hands of the designers; a true benefit to everyone
who lives and works indoors.

Saturday August 10, 2019 10:15am - 2:45pm EDT
Nulu

Demo Room

10:15am EDT

TM-30 Experience Room

Saturday August 10, 2019 10:15am - 2:45pm EDT
Clifton

Demo Room

11:30am EDT

Luncheon

Saturday August 10, 2019 11:30am - 1:30pm EDT
Commonwealth 4-8

Luncheon

1:45pm EDT

Isolation & Darkness: Surviving Winters in Antarctica

Antarctica: The few people who visit or work there generally do so during Antarctic summers. Most of the workers leave at the end of summer and the majority of stations are mothballed, typically from April to October. However, a very few of Antarctica's bases remain operational all year and this means that a handful of hardy people live and work isolated, without sunlight and beyond rescue for many months at a time. For human beings, exposure to the extremes of the Antarctic environment in winter would result in death within minutes, so during these winter months there is no choice but to remain permanently inside their station accommodation and one factor of this is living/working purely under artificial lighting for more than 3 months.

One such 12-month permanently staffed base is the British Antarctic Survey’s Halley VI Station. As the name suggests, this is the sixth incarnation of the base, the first of which was built in 1964 and set up what would become BAS Halley’s permanent home on the Brunt Ice Shelf.

The Presenter has had the unique opportunity to both design the lighting for a brand new and revolutionary design of Station. But additionally was able to access 40-years of human chronological research data undertaken at the base's previous incarnations and was able to use this data and tailor the new base's lighting around the specific needs of the base future occupants. Finally since the base opened and has been occupied for 5 winters now, the presenter is still in touch with staff and has seen how dramatic the improvement has been to occupants and their lives.

Speakers

Martin Valentine

Martin Valentine was appointed Global Design Director at Ligman Lighting in 2018 and has worked in the field of specialist lighting design for over 25-years. A Masters graduate from the Bartlett School of Architecture he has worked within the client, independent design practice, multidisciplinary... Read More →

Saturday August 10, 2019 1:45pm - 2:45pm EDT
Olmsted 1

Seminar Session, Art/Design

1:45pm EDT

The Future Is Here: How Virtual Reality Helps Lighting Designers Make Better Design Decisions

Not long ago, Virtual Reality (VR) could only be found in science fiction movies like The Matrix and Star Trek. It was only 3 years ago that the obsession with the game “Pokeman Go” made news headlines, but in just a short span of a few years, VR and Augmented Reality (AR) have been utilized in a broad market of consumer devices.
Now VR technology is everywhere and it is the new design tool in the construction world. Architects use VR as a useful design tool, which makes them capable to portray their ideas better than ever. Lighting designers have a crucial role in any architectural design and by utilizing the latest technologies, they can establish their importance as keynote members of all phases of design.
Imagine a tool that can be used to present lighting ideas to clients without going through the time consuming process of rendering multiple views of each scheme, a powerful gizmo to minimize errors and make sure design coordination goes much more smoothly.
By the end of this presentation, you will know the essential benefits of designing with VR. You will see examples of utilizing VR to study daylight and artificial lighting, and you will experience immersing yourself in your designs!

Speakers

Shahrzad Abtahi

Shahrzad is the director of lighting design at Lightcraft. She holds a Bachelor of Engineering in Architectural Design and Master of Arts in Interior Architecture.Shahrzad teaches lighting and design courses at Suffolk University and Boston architectural college and is a Board Member... Read More →

Saturday August 10, 2019 1:45pm - 2:45pm EDT
Olmsted 2

Seminar Session, Art/Design

1:45pm EDT

The Missing Piece to All Those Wellness Studies

Brad will begin the session by presenting the case for health and wellness in the built environment. He will engage the audience in reflections on their current state, how healthy or well they feel in this environment, and will explore what elements of their space are contributing to and detracting from optimal performance.
Next, Brad will walk the attendees through two very different scenarios and they will explore how the client’s business values drove the project’s sustainability and wellness priorities. Brad will present the third-party studies that fueled the design strategy for each project, and will expose the math that was used to quantify the ROI on one feature verses another.

The group will put themselves in the driver’s seat as they think through the way they would approach these scenarios, and will see their ideas reflected in changes to a real-time dashboard with potential solutions bringing them closer to or further from the client’s goal.

When the session concludes, the attendees will have heard from an expert, and also put themselves in the role of expert, working through a mock scenario for a typical client engagement.

Speakers

Brad Pease

Brad Pease is vice president at Paladino and Company, an internationally recognized green building consulting firm. Brad leverages the diverse expertise and perspectives of his team members to deliver sustainability concepts and technical design strategies to clients. Through rigorous... Read More →

Saturday August 10, 2019 1:45pm - 2:45pm EDT
Olmsted 3

Seminar Session, Business

1:45pm EDT

A Case Study Comparison of Energy Savings and Occupant Comfort for a Luminaire Level Lighting Controls One-For-One Replacement in an Open-Office Environment

This paper documents the early phases of a study that is collecting time-resolved energy consumption, cost, and human factors comfort data in a mock-up of a typical open office space to compare a baseline lighting solution to several Luminaire Level Lighting Controls (LLLC) one-for-one retrofit lighting solutions. The study is looking to determine if LLLC one-for-one retrofits are a viable alternative to full lighting redesigns which may be higher cost for design, specification, install, and commissioning. This determination will be made after additional data collection under different LLLC systems. This paper focuses on energy and human factors data gathered for the baseline and first LLLC systems. The data for each include four weeks of energy monitoring resulting in 30 human factors questionnaire samples. We find that the LLLC lighting solution produced 70% energy savings compared to the Baseline, confirming that LLLC solutions have significant potential as an energy savings measure. Additionally, the human factors data shows that while the LLLC system produced perceptible lighting changes, it did not show significant distraction over the baseline.

Speakers

Paul Ward

University of Oregon

Saturday August 10, 2019 1:45pm - 2:45pm EDT
Olmsted 6

Technical Presentation

1:45pm EDT

A Laboratory Method for Measuring the Heat Distribution of Luminaires and Its Application for Building Heating and Cooling Energy Savings

This study was aimed to explore the energy saving potential of a new system architecture of solid-state lighting fixtures that was designed to help utilize the heat generated by LEDs for spacing heating in heating season and re-heating in cooling season. The new system architecture, which deploys an innovation of integrative light and heat arrangement in low profile, helps harvest the LED heat and direct most of the heat to the room space while minimizing heat leakage to the ceiling cavity. A well-designed laboratory experiment was carried out in a newly developed Calorimeter chamber that was used to find out heat distribution of luminaires in the conditioned room cavity and ceiling plenum, followed by an estimation of potential energy savings via computer simulation in Energy Plus. A typical primary elementary school classroom was used in this computer simulation equipped with LED fixtures with different heat distribution patterns. It was found that in heating season, the building space heating energy consumption could be reduced as the ‘conditioned space/ceiling plenum split’ increased. While in cooling season, the LED heat gain in the conditioned room could be utilized to warm up the chilled supply air to supplement the function of reheating system. The new system architecture of LED fixtures with integrative lighting and heating arrangement could save 4.4%-4.7% of annual building heating and cooling energy uses by reducing reheating energy consumption in cooling season and space heating energy consumption in heating season.

Speakers

Hongyi Cai

University of Kansas

Dr. Cai is an Associate Professor in the Department of Civil, Environmental, and Architectural Engineering (CEAE) at the University of Kansas.

Hankun Li

University of Kansas

Hankun Li is a Ph.D. student in University of Kansas. He received his M.S in Architecture Engineering lighting energy saving from University of Kansas in 2019. He also received his B.Eng. in Civil Engineering with a concentration in building structural design from Chongqing University... Read More →

Saturday August 10, 2019 1:45pm - 2:45pm EDT
Olmsted 6

Technical Presentation

1:45pm EDT

Tunable Lighting in a NICU and Behavioral Health Unit – A look at the research

This presentation summarizes a research project that is finishing at the University of Kentucky NICU and a research project that is underway at the Boulder Community Health Behavioral Health Unit.

Speakers

Sarah Safranek

Pacific Northwest National Laboratory

Andrea Wilkerson

Pacific Northwest National Laboratory

Andrea Wilkerson is a Senior Lighting Research Engineer at Pacific Northwest National Laboratory, focusing on the evaluation of emerging lighting in realistic settings, supporting the U.S. Department of Energy Solid-State Lighting program. She earned her doctorate from Penn State... Read More →

Saturday August 10, 2019 1:45pm - 2:45pm EDT
Olmsted 5

Technical Presentation

3:00pm EDT

3D Printing: Can It Work for Lighting?

This presentation will cover the state-of-the-art of 3D printing for lighting, including recent research on the ability of current print materials, 3D printers, and different additive manufacturing methods to create the optical, thermal, and electrical components required by lighting systems. The presenters will share results from laboratory studies conducted at Rensselaer’s Lighting Research Center on the use of 3D printing to create lighting components. In addition, the presentation will discuss the impact 3D printing will have on business.

Speakers

Nadarajah Narendran

Nadarajah Narendran, Ph.D. is the Director of Research at the Lighting Research Center and a professor in the School of Architecture at Rensselaer Polytechnic Institute in Troy, New York. Dr. Narendran is well known throughout the lighting industry for his pioneering research in the... Read More →

Indika Perera

Dr. Indika Perera is a research scientist with the Lighting Research Center at Rensselaer Polytechnic Institute. His research interests include thermodynamics, heat transfer, material characterization, and additive manufacturing of solid-state lighting components and systems.Dr. Perera’s... Read More →

Saturday August 10, 2019 3:00pm - 4:00pm EDT
Olmsted 3

Seminar Session, Science/Technology, Business

3:00pm EDT

Designing Visually Accessible Spaces (DeVAS): A Tool to Predict Visibility of Potential Hazards During the Design Phase

Following a decade of research, DeVAS has created a set of prototype software tools that predict visibility for mild through severely degraded vision. Built upon collaborative research at University of Minnesota’s Low Vision Lab, University of Utah Computer and Cognitive Science, and Indiana University Lighting Design, this luminance based National Eye Institute supported work (NIH#5-RO1EY017835-10) will be presented in the context of the designer’s workflow, enabling the design of safer environments for the mobility of low vision individuals. Additional presenters include low vision specialist Gordon Legge via an introductory video and computer scientist Bill Thompson to respond to technical questions via phone.

Speakers

Robert Shakespeare

Rob Shakespeare is principal consultant at Shakespeare Lighting Design LLC. As Professor of Lighting Design and a researcher, he served at Indiana University for 29 years. He co-authored Rendering With Radiance: The Art and Science of Lighting Visualization with Greg Ward. Currently... Read More →

William Thompson

Thompson is Professor of Computer Science, School of Computing, University of Utah. His primary research interest is in the area of computational vision, with an emphasis on problems involving the determination of spatial organization.He is first author of Visual Perception from a... Read More →

Gordon Legge

Legge is a Distinguished McKnight University Professor in the Department of Psychology, University of Minnesota and the DEVA project PI. In 2015 he was awarded the Helen Keller Foundation for Research and Education in recognition of outstanding contributions to vision research... Read More →

Saturday August 10, 2019 3:00pm - 4:00pm EDT
Olmsted 1

Seminar Session, Science/Technology

3:00pm EDT

Light & Emotion - Beyond the 5 Senses

Light, as we observe it, is more complex than can be calculated in software. When we appreciate the nuance of light and shadow we speak to the 5 senses and more. We are engaged in a way that goes beyond expectations of the light meter. While standards promote orchestrated light levels and uniformity it’s important we appreciate light for its impact on our emotional selves. Understanding more than the 5 senses is an integral part of this.

The purpose is to help designers further understand that though footcandle and uniformity criteria are important it’s light and shadow that catches the eye, excites the heart and can have a visceral impact (good or bad) on our human selves.

Speakers

Robert White

Robert White, IALD, LC, IESFrom his early days as an Industrial Design graduate at Detroit’s College for Creative Studies to the present as design principal at Illuminart, Robert has been creating innovative lighting design solutions for over 30 years. His extraordinary range of... Read More →

Saturday August 10, 2019 3:00pm - 4:00pm EDT
Olmsted 2

Seminar Session, Art/Design

3:00pm EDT

How Light Affects Orientational Decision-making

It is an intuitive belief that light has an effect on general wayfinding and path-choosing. Assuming that this method does draw users’ attention to the desired surfaces, quantifying the specific relationships could help the specification process and forming circulation paths with light.This study was to determine a luminance-based scale to which vertical brightness impacts oritentational decision-making.

Speakers

Xingying Peng

The Lighting Practice

Xingying is a Lighting Designer I at The Lighting Practice and a recent graduate of the MFA Lighting Design program at Parsons School of Design, the New School. She is interested in lighting's impact on human behavior.

Saturday August 10, 2019 3:00pm - 4:00pm EDT
Olmsted 6

Technical Presentation

3:00pm EDT

Light Source CCT and Visual Performance in Roadways - An Investigation

The CCT of a light source is a popular topic of discussion with many different impacts and aspects of the light source to be considered. This is a research project which considered different light sources in a visibility task in a road environment. We will discuss the impact of the light source in the roadway application.

Speakers

Ron Gibbons

Center for Infrastructure Based Safety Systems (CIBSS) at the Virginia Tech Transportation Institute (VTTI)

Saturday August 10, 2019 3:00pm - 4:00pm EDT
Olmsted 5

Technical Presentation

3:00pm EDT

Should We Illuminate Areas Adjacent to the Roadway? The Need for Surround Ratios in the Age of LEDs

Light levels for roadways are based on legacy light sources (like high-pressure sodium) which have poor optical control. This means that areas adjacent to the roadway are also illuminated which could have provided a safety benefit by increasing visual information perceived by the driver. With the advent of light-emitting diodes (LEDs), light distribution can be controlled and only the roadways can be illuminated without lighting any areas beyond. Surround ratio is measure of how bright the travel lanes on the roadway with respect to the adjacent areas of paved and unpaved shoulders. CIE 140-2000 defines surround ratio as the average horizontal illuminance on the two longitudinal strips each adjacent to the two edges of the carriageway to the average horizontal illuminance on two longitudinal strips each adjacent to the two edges of the carriageway (each of the two sides of a divided highway, each of which usually have two or more lanes). In order to develop recommendations for LED roadway lighting it is important to determine if the additional lighting beyond the roadway provides any safety benefit to the drivers’ visibility so that organizations like IES and American Association. This study assessed the effects of varying surround ratios on driver visual performance in a realistic night driving task.

Speakers

Rajaram Bhagavathula

Center for Infrastructure Based Safety Systems at Virginia Tech Transportation Institute

Dr. Rajaram Bhagavathula is a Senior Research Associate in Center for Infrastructure Based Safety Systems at Virginia Tech Transportation Institute. His research is focuses on the effect of the built environment on road user safety. Specifically, he aims to understand the safety effects... Read More →

Saturday August 10, 2019 3:00pm - 4:00pm EDT
Olmsted 5

Technical Presentation

3:00pm EDT

The Influence of Color Temperature along with Illuminance on Subjective Impressions in Lighting

This study follows on the work of John Flynn exploring the influence of light on subjective impressions of an environment. In particular, the study focuses on chromaticity, i.e., color temperature, and light level, illuminance, as two of the parameters that might influence these subjective impressions. Thirty-two subjects rated their impressions on a series of semantic-differential rating scales relative to six color temperatures and three illuminance levels delivered in a classroom-like environment. Additionally, the subjects were asked to rate the perceived difference in chromaticity in a series of paired comparisons on a scale of 1 to 10 to determine how easily the color temperatures were distinguishable from one another for each illuminance level. The results suggest chromaticity has a stronger influence on subjective impressions than could be determined by Flynn, but with trends that differ somewhat with respect to illuminance level. Additionally, the results suggest that color temperatures varied in distinguishability relative to difference in color temperature and to some degree illuminance level.

Speakers