Specifying Outdoor Lighting That Enables Decarbonization and Minimizes Light Pollution Doesn’t Have to be a Headache

Leora Radetsky, DesignLights Consortium | Tony Esposito, Lighting Research Solutions LLC

Location: Nassau

March 19, 2024
12:30 pm - 1:30 pm EST

Credits 1 LU | Elective


Communities and local governments want lighting solutions that allow them to meet outdoor lighting ordinances and achieve their decarbonization goals while juggling challenges associated with inconsistent lighting nomenclature and performance metrics. Concurrently, LEDs with non-standard chromaticities —especially phosphor-converted Amber LEDs—are gaining popularity as a strategy for mitigating light pollution, and do not have standard lighting specification language. In this talk, we will discuss the importance of reducing light pollution, describe a specification structure for non-white LEDs, provide an LED performance comparison, give an update on the ANSI C78.377 chromaticity standard, and describe additional resources for evaluating outdoor luminaires.

Attendees should understand spectrum characteristics such as spectral power distributions and chromaticity coordinates as well as photometric analyses.

  • Learning Objectives
    Participants will gain a deep understanding of the negative impacts of light pollution and how to combat it.
  • Participants will learn of a series of resources for specifying non-white light fixtures
  • Participants will understand the difficulties in specifying non-white light and will be given a specification framework that can be used immediately
  • Participants will be abreast of the latest standards development work underway (specifically ANSI C78.377)


Leora Radetsky
Leora Radetsky
Senior Lighting Scientist
DesignLights Consortium

Leora Radetsky is the LUNA Program Director and a Senior Lighting Scientist at the DesignLights Consortium (DLC) where she focuses on developing lighting solutions that promote energy optimization, quality, human factors, and performance in the areas of horticultural and architectural lighting. She has 25 years of experience in the lighting industry as a research scientist with the Lighting Research Center at Rensselaer Polytechnic Institute and Director of Customer Education at Lighting Analysts, Inc. She has extensive research and engineering experience in horticultural lighting, lighting software, product testing, lighting controls, photometry, daylighting, outdoor lighting and circadian rhythms. In 2014, she was awarded an IES Regional Technical Award from the Northeast region for her significant scientific contributions to the field of illumination. Leora has a B.S. in Architectural Engineering with an Emphasis in Illumination from the University of Colorado at Boulder, and an M.S. in Lighting from Rensselaer Polytechnic Institute. She is Lighting Certified by the NCQLP.

Tony Esposito
Tony Esposito
Director, Standard Development, Light Concept Lead
International WELL Building Institute

Founder and Head Research Scientist | Lighting Research Solutions LLC

Dr. Tony Esposito is a lighting quality researcher with a background in lighting design and engineering. He is the Director and Light Concept Lead at the International WELL Building Institute (IWBI), the Founder and Head Research Scientist at Lighting Research Solutions LLC (a lighting consultancy providing services in research, education, and development), and Co-Chair of the Color Committee of the Illuminating Engineering Society.

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