Live! from the LHRC
2023 Webinar Series

These live, one-hour webinars include information on the latest research in lighting and are interactive to allow participants to ask questions of Light and Health Research Center (LHRC) researchers about each of the topics presented.

Topics and Schedule

So Watt

Presenters: Mark Rea and Mariana Figueiro

Date: April 11, 2023 – 2:00 PM ET

To support the widespread implementation of circadian-effective lighting in commercial spaces, the LHRC has developed a standardized method for comparing luminaires in terms of the potential for delivering circadian-effective light to an observer. This webinar will review the proposed methodology for comparing the electric power (Watts) needed by a luminaire to deliver a criterion circadian stimulus value to a standard observer (SO). 

Understanding Glare

Presenters: John Bullough and Mark Rea

Date: June 13, 2023 – 2:00 PM ET

Glare is a much discussed, but poorly understood topic in the field of lighting, and the proliferation of LED lighting systems has brought new concerns about glare. This webinar will describe the different types and effects of glare, and what aspects of light intensity, distribution, and color impact it. Practical guidance for minimizing glare will also be discussed.

Replacing Pesticides with Light

Presenters: Nicholas Skinner and Mark Rea

Date: October 17, 2023 – 2:00 PM ET

Climate change has the potential to increase the proliferation and severity of plant diseases, putting pressure on the global food supply. Ultraviolet (UV) “light” has shown potential to combat several types of fungal and bacterial pathogens that affect important food crops. This webinar will review recent findings on the use of UV, including in combination with photocatalytic agents, to combat several types of plant pathogens. It will also discuss the emergence of UV LED technology and the opportunities provided by this new technology.

Circadian Effective Lighting – Does Spectrum Matter? 

Presenters: Rohan Nagare and Mariana Figueiro

Date: December 5, 2023 – 2:00 PM ET

Research has shown that light can have a profound effect on people’s sleep, health, and well-being. This has led to a desire to design lighting installations that will support these important factors. However, there is confusion about the various metrics designers should use to specify circadian effective lighting. This webinar will review the various circadian lighting metrics currently in use and the role that spectrum plays, along with other important factors, in the specification of circadian effective lighting.


The cost to attend each Live! from the LHRC webinar is $25.00. A discounted price of $20.00 is available to employees of LHRC Partner organizations. Participants may register for as many of the webinars as they choose.

Continuing Education Credits

Participants will earn 1 continuing education unit (CEU) for attending each of the Live! From the LHRC webinars. Certificates documenting the CEUs will be emailed to participants at the conclusion of the webinar series.


John Bullough, PhD, is a program director at the LHRC.  Dr. Bullough conducts research in a wide range of areas related including human factors, transportation lighting, and lighting for safety.  He has conducted numerous studies looking at the quantification and prediction of glare from both interior and exterior lighting systems and is the author of the recent book Understanding Glare in Exterior Lighting, Display, and Related Applications, published by the International Society for Optics and Photonics (SPIE).

Mariana Figueiro, PhD, is among the world’s leading experts in the area of light and health, with a focus on bridging science to practical applications aimed at improving human quality of life. She has made a significant impact on this developing field and continues to actively expand her influence through translational research and teaching. She is the Director of the Light and Health Research Center and serves as Principal Investigator of various research projects at the Center. She regularly collaborates with lighting designers and manufacturers, through her work with the Center’s Light and Health Partners program. Dr. Figueiro previously served as the Director of the Lighting Research Center at Rensselaer Polytechnic Institute.

Rohan Nagare, PhD, is a research scientist at the Light and Health Research Center. He holds a PhD in Architectural Sciences with a concentration in Lighting from Rensselaer Polytechnic Institute. He currently works on a variety of health-related research projects at the LHRC including work on modeling of the human circadian system, the impact of light on circadian entrainment, as well as other related research.

Mark S. Rea, PhD, is a professor at the Light and Health Research Center and an expert in human vision, lighting engineering, human factors, photobiology, psychology, and light and health. He is the author of more than 100 scientific and technical articles related to vision, lighting engineering, and human factors and was the editor-in-chief of the 8th and 9th editions of the IESNA Lighting Handbook. His current research projects include the study of the effects of light on circadian disruption, lighting to enhance the safety of emergency workers, and the development of a bias-free pulse oximetry device. Dr. Rea has conducted groundbreaking research in the areas of human visual performance, visual efficacy at nighttime light levels, and light and human health. 

Nicholas Skinner, MS, is senior clinical research coordinator at the LHRC. He holds undergraduate degrees in both physics and mechanical engineering and a master of science in lighting. He has worked extensively on the application of ultraviolet energy to mitigate plant pathogens including leading field trials in the use of UV to combat squash powdery mildew, cucumber downy mildew, and fire blight on apple crops. His current work also includes the design of a system to apply UV LED technology to agricultural applications. 

For More Information

For more information on these Live! From the LHRC webinars, please contact Dan Frering, the LHRC’s Director of Educational Programs at


The Live! From LHRC webinar series is sponsored by members of the Light and Health Research Center’s Lighting Education Partnership.