What's so smart about Smart Lighting Control Systems?

I am a user centered innovation professional

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I am a user centered innovation professional, currently involved in lighting applications research and innovation with a special focus on health and well-being in the workplace.  I have broad experience in project management, lighting product and system specification and development, user testing and product marketing of lighting systems. I am passionate about the importance bringing the design process and the understanding of high performance building requirements to inform the creative journey of redefining what the right light at the right place at the right time means in order to bring a lighting system concept through research, development and into commercialization.

Tuesday, March 13: 5:00 PM  - 6:30 PM 

Conference Session 


Time, space and color truly intersect, or collide, in the world of multichannel lighting. LED platforms, driver limitations, SPDs, sensors and software – these are but a few elements to consider as researchers create lighting systems for 24 hour working and healing environments today. Designers face an onslaught of new companies and technologies: IOT, sources, protocols and interfaces. Together, we'll explore how these new design parameters are being integrated into new lighting systems and the impact of the pace of change on projects and the design community. Join the discussion, supported by case studies of cutting edge healthcare, WELL projects and office environments illustrating the use of new tools to help imagine and create lighting systems.


• Learn how to tell time by color of your environment, not a clock on the wall; spectral changes related to 24 hour circadian support or team activity offer a glimpse into time of day

• Gain perspective on how to characterize multi-channel systems in office and patient room applications – new ways to assess energy, efficacy, and people’s response

• Understand the utility and how- to- apply of new metrics describing non–image forming lighting and lighting quality; how to fine tune and tailor lighting to take full advantage of tunable systems

• Apply evidence-based design guidelines for retrofit, substantial renovation and new construction commercial offices – improving the employee environment in spaces constructed from 1970 to 2020 

Can Changes in Color Temperature Influence Subjective Impressions in an Environment?

Craig Bernecker Presenter
Associate Professor of Lighting Design
Parsons School of Design/The Lighting Education Institute

Dr. Bernecker is Founder of The Lighting Education Institute and professor in the Masters of Fine Arts in Lighting Design program at Parsons School of Design.  Prior to founding The Lighting Education Institute, he directed the lighting education program within the Department of Architectural Engineering at Penn State University. He has published more than forty articles on research and education in lighting design and illumination engineering and is known for his work on the psychological aspects of lighting.  He also maintains an active consulting practice, providing lighting design services and serving as an expert consultant on many projects and as an expert witness on many legal cases.  He regularly serves as a peer reviewer for lighting research proposals and projects sponsored by the U.S. Department of Energy.

Dr. Bernecker has served the Illuminating Engineering Society of North America as Vice-President for Technical and Research Activities (1991-1993) and Vice-President for Educational Activities (1993-1995).  More recently, he served the Society in its highest office, as Senior Vice-President for 2003-2004, President for 2004-2005, and Immediate Past President for 2005-2006.  The IESNA named him a Fellow in 1991, and granted the Distinguished Service Award in 2017.

Tuesday, March 13: 6:30 PM  - 7:30 PM 

Conference Session 


The work of John Flynn has been a benchmark in predicting subjective responses to lighted environments. Flynn's work has been the basis for lighting design practice recommendations in the CIE, the Illuminating Engineering Society handbook, 9th edition, and the Illuminating Engineering Society handbook, 10th edition, and is often cited in many other studies. Flynn's work focuses on the concept that certain characteristics of lighting in an environment can generate consistent patterns of impressions among the majority of occupants in the environment. In this context, Flynn identified both subjective impressions that can be influenced by lighted environments and the characteristics of a lighted environment that can elicit these impressions. Some of the subjective impressions Flynn identified include spaciousness (and its opposite, confinement), relaxation (and tension), privacy (and public), as well as overall impressions of preference.

The characteristics of a lighted environment, or "lighting modes" as he called them, include overhead (vs. peripheral) lighting, uniform (vs. non-uniform) lighting, bright (vs. dim) lighting, and visually warm (vs. visually cool) lighting. This fourth mode, visually warm vs. visually cool, was the weakest of the four lighting modes Flynn identified. One of the limiting aspects of the study of this lighting mode was the lack of availability of a wide range of color temperatures of light sources available to manipulate as an independent variable in the study of the influence of the visually warm/visually cool mode on subjective impressions. Flynn had warm white and cool white fluorescents, along with incandescent and/or halogen sources, quartz metal halide, and high-pressure sodium to light the test environments. Flynn's studies were not only limited by the few color temperatures to test, but also by their limited color rendering abilities.

Today's availability of solid state lighting (LED) sources provides a much wider array of light source colors of almost limitless steps in color temperature, while maintaining good color rendering across those steps. Thus there would appear to be a significant opportunity to revisit Flynn's work to determine just how much a role light source color might have on subjective impressions of architectural environments. Such a study was undertaken in a dedicated test space at Parsons School of Design. The space is an approximately 20' x 20' x 10' classroom with fairly neutral finishes throughout. Two, twelve-foot long suspended direct/indirect tunable white luminaires in two rows were installed in the space. Both the direct and indirect components had separate dimming and color temperature controls, allowing the tuning of color temperature and intensity of light. The test conditions were six color temperatures – 2700K, 3000K, 3500K, 4000K, 5000K, and 6000K – while a constant illuminance of 50 foot-candles was delivered at the center of the room with less than a 2:1 ratio between the maximum and minimum illuminances. Similarly, the luminances of the ceiling and walls were quite uniform in an attempt to hold the three other lighting characteristics constant. Forty subjects were tested in groups of eight. Testing followed the protocol developed and published by Flynn, in attempt to replicate the testing procedure as closely as possible. The data suggests a clear influence of color temperature on subjective impressions of the space.


• Attendees will understand the basic principles of the Flynn work on subjective impressions of lighting systems.

• Attendees will recognize the limitations of the Flynn studies on the influence of color temperature on subjective impressions

• Attendees will understand the parameters of the study of chromaticity using tunable white on subjective impressions of an environment

• Attendees will recognize the implications for design using tunable white to reinforce subjective impressions in an environment 

The Lovers of Light - a Point Counter Point Game Show Discussion on Lighting Topics We Care About

Natalia Lesniak Co-Presenter
Senior Lighting Designer
Lumen Architecture
New York , NY 

Architectural lighting designer Natalia Lesniak is a multidisciplinary practitioner with a background and education in the arts and sciences, from the Cooper Union School of Art and the Lighting Research Center at Rensselaer Polytechnic Institute. She has worked on experiments and research that focus on the impact of light on circadian rhythms, cognitive performance, and the development of research based light therapy and design strategies. As a designer she works on a range of residential, office, hospitality, retail, and other commercial projects.

Jana Owens Co-Presenter
Central Regional Sales Manager


Angelica Santana Co-Presenter

Senior Lighting Designer
CM Kling + Associates Inc
Alexandria , VA 

Angelica is an Associate at CM KLING + ASSOCIATES INC. in Washington, DC specializing in hospitality, government, and convention center projects. She graduated from The Pennsylvania State University with a Bachelors of Architectural Engineering, with a focus in Lighting Design and Electrical Systems.

Angelica is the IES DC section past president (3 years) and the current District Vice Chair for the Illuminating Engineering Society. She is an active member of the NEMA Daylight Management Council. In 2014, LD+A magazine featured her as one of the leaders in the lighting design emerging professional community.

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