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Educational Opportunities
The Photometry Institute Online Course

This online course is conducted in a series of six weekly 2.5-hour live, interactive classes.

Dates for the next Photometry Institute are to be determined.

Who should attend?

  • LRC researcher with luminaire and integrating sphereEngineers, technicians, and testing personnel from lighting and related companies interested in learning more about photometric, colorimetric, and related evaluation of lighting products and prototypes.

  • Personnel from testing facilities who want to hone their skills and knowledge about testing requirements for solid-state as well as traditional light sources and lighting systems.

  • Managers, engineers, product developers and designers from lighting and related companies interested in setting up photometric testing capabilities to benchmark and evaluate product prototypes in their own facilities.

  • Anyone who wants to know more about the rapidly changing requirements for testing and evaluation of solid-state light sources and systems.

What will you learn?

People who attend the Photometry Institute will come away with the knowledge and skills needed to establish and conduct photometric testing and evaluation of a wide range of lighting products and systems. At the conclusion of the seminar, participants will be able to:

  • Understand photometric and colorimetric terms and concepts used in lighting measurement and product evaluation

  • Understand industry standard test procedures and requirements included in programs such as ENERGY STAR®, Design Lights Consortium, and others

  • Operate various types of equipment used in lighting measurement and photometric evaluation

  • Apply standard photometric laboratory practices and protocols in their own facilities

  • Understand requirements for testing and measurement of solid-state light sources and systems and be able to accurately evaluate the performance of solid-state lighting products

  • Measure standard photometric quantities including illuminance, luminance, luminous flux, and luminous efficacy

  • Measure and calculate various spectral and colorimetric quantities such as correlated color temperature and color rendering metrics

  • Understand the equipment needed to create and/or assemble inexpensive photometric capabilities in their own facilities to make accurate measurements of the performance of pre-production prototypes

  • Interpret and apply photometric data in the evaluation of product prototypes and models

How is the Institute structured?

The Photometry Institute will be held as series of six, weekly online classes. Each weekly online session will be 2.5 hours in length. Online sessions will be held on Wednesday afternoons from 1:00 to 3:30 PM US Eastern Time, beginning April 7, 2021 (see schedule below). Each class session will include lectures as well as live, interactive demonstration sessions from the LRC’s photometric laboratories.

Week 1
Introduction to photometry and colorimetry – Presenters will review important concepts in photometric and colorimetric measurement, calculation, and evaluation. This session will cover the luminous efficiency function as the basis of photometry, the principles behind the inverse-square law, integrating sphere and goniophotometer measurements, and fundamentals of light source color metrics.
Week 2
Photometric equipment demonstrations – Presenters will review various types of illuminance and luminance meters, spectroradiometers, and other equipment need to take various photometric, electrical, and thermal measurements. This session will cover information relevant to principles of operation, selection, calibration, and use of the different instruments.
Week 3
Luminous flux measurements, session 1 – This session will focus on the equipment and procedures for taking luminous flux measurements using an integrating sphere system. During this session the presenters will cover luminous flux and spectral standards, calibration, self-absorption, practical issues and best practices for accurate measurements of light output and color metrics.
Week 4
Luminous flux measurements, session 2 – This session is a continuation of the previous week and will include demonstrations of the equipment in use to measure an LED replacement lamp.
Week 5
Luminous intensity measurements – This session will cover the equipment and procedures for conducting luminous intensity measurements using a bar photometer, imaging photometer, and goniophotometer system. The presenters will cover aspects of calibration, alignment, and control of stray light, and will demonstrate the intensity measurement of an LED replacement lamp using a bar photometer.
Week 6
Photometry data review, interpretation, and reporting – The final class session will focus on information that is included in typical photometric reports for light sources and luminaires and how that information is used by lighting designers and specifiers. Presenters will also review information required for ENERGY STAR®, Designs Lights Consortium, and other product qualification programs.


Continuing Education Credits

Participants will earn 15 CEUs (continuing education units) for attending the Photometry Institute and will receive a continuing education certificate in photometry.


Registration for the online Photometry Institute is $1,200 per person. LRC Alliance members can register for the discounted price of $960. Residents of New York State can register for the discounted cost of $360, made possible through funding from the New York State Energy Research and Development Authority (NYSERDA). 50% of the fee is due at the time of registration, the remainder will be charged on April 1, 2021.

About the Instructors

Instructors for The Photometry Institute Online will include a number of LRC faculty and staff:

N. Narendran, PhD — Dr. Narendran is a professor and director of research at the LRC. He is well known throughout the lighting industry for his pioneering research and educational activities in the field of solid-state lighting. Dr. Narendran leads a team of researchers and educators in the area of solid-state lighting at the LRC, and conducts research and educational programs to accelerate the development and market transformation of this promising technology. Dr. Narendran teaches the Physics of Light course within the LRC’s graduate education program, which includes photometry and optics. In addition, he has developed and taught courses in optics, LEDs, and fiber optic lighting. Dr. Narendran has authored or co-authored more than 130 articles in archival journals and proceedings and holds more than 50 patents. He is a Fellow of the Illuminating Engineering Society of North America and the International Society for Optics and Photonics (SPIE).

Jean Paul Freyssinier, MS, LC — Professor Freyssinier is a senior research scientist and adjunct assistant professor at the LRC. His research includes solid-state lighting, LED performance, technology transfer, energy-efficient lighting design, photometry, the spectral effects of lighting, and education. Since 2000, he has been involved in lighting technology research, development, and evaluation at the LRC. His previous experience includes working as principal of design at a full-service architectural lighting and automation design firm and as project manager at an energy management firm, both in Mexico. He has taught in the LRC's graduate education program for the past 15 years and lectures frequently at conferences and seminars. He is the author of more than 35 scientific and technical articles related to energy efficiency, photometry, improved LED performance, and field applications, and co-author of six patents on LED remote phosphor technology.

Indika Perera, PhD — Dr. Perera is a research scientist working within the LRC's Solid-State Lighting Program. He is a graduate of the LRC's doctoral program with a degree in architectural sciences with a concentration in lighting. Dr. Perera's expertise is in heat generation, transfer, and thermal management within LED lighting systems. His studies led to the publication of a mathematical model for predicting the temperature distribution in an LED phosphor layer, providing insight that is difficult to observe in experimental studies. His publication was a top download from the SPIE Digital Library under the category of light sources and illumination. His research interests include thermal management, material characterization, thermal measurements of solid-state lighting applications, and additive manufacturing including 3D printing.


The Photometry Institute is supported by:

Sponsored by NYSERDA (New York State Energy Research and Development Authority) Sponsored by ASSIST (Alliance for Solid-State Illumination Systems and Technologies) Sponsored by the Lighting Research Center
Industry support

The following companies have provided equipment and other support to the Photometry Institute:

Gigahertz-Optik, Inc. Instrument Systems, GmbH Labsphere, Inc.
SENSING Instruments Co., Ltd. Xitron Technologies  

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