IES Webinar: TM-21-21, Projecting Long-Term Luminous, Photon, and Radiant Flux Maintenance of LED Light Sources
March 10, 2022 | 12:00pm ET
The rated flux maintenance life of an LED is the elapsed operating time over which an LED light source maintains a given percentage of its initial light output. The flux maintenance of an LED light source is dependent upon many variables, including the operating temperature, drive current, and technology and materials used to construct the product. As such, the flux maintenance of LEDs can vary not only from manufacturer to manufacturer, but also between different LED package types produced by a single manufacturer. This document recommends a method of projecting the flux maintenance of LED light sources from the data obtained by IES LM-80-15 testing. This document was developed by a dedicated TM-21 Working Group of LED industry professionals. The analyses of the IES LM-80-15 test data provided by major LED manufacturers are used to rationalize and support this document. Much of the IES LM-80-15 data came from testing that extended to 9,000 hours, and in some cases beyond.
Webinar participants are eligible for one (1) IES Continuing Education Unit (CEU).
PRESENTERS
Eric Bretschneider
Eric Bretschneider has spent his entire career working in the field of high brightness LES. Over the course of the last 30+ years he has worked in the industry at every stage of LED production from MOCVD hardware/process design all the way through to fixture/luminaire design and manufacturing. He is a noted expert in many fields including phosphor conversion, radiometric/photometric measurement of LED packages and fixtures, reliability and IP matters in Solid-State Lighting. Since 2006 he has been a member of the IES Test Procedures Committee and the IES Science Advisory Panel. He is the current technical lead for IES TM-21 and IES TM-28. He also developed the mathematical model used in IES TM-35 for predicting chromaticity shift of LED packages. He holds over 40 patents related to LED technology and earned his Ph.D. in Chemical Engineering from the University of Florida.
Alex Baker, IES Manager of Government Affairs and Public Policy
Alex heads government affairs and public policy efforts for the IES, working closely with federal and state agencies, elected officials, and allied organizations. With nearly 20 years in the lighting industry, Alex previously worked in standards development for Philips, Lumileds, and the U.S. EPA’s ENERGY STAR program, and also worked in lighting specification sales in New York City. Alex is a longstanding member of the IES, having participated in the development and maintenance of definitions, methods of measurement and related technical memoranda for solid-state lighting products through the Testing Procedures and Nomenclature Committees. In a prior life, Alex worked as a Gaffer and Best Boy in film and television production. Alex received a Master of Science in Lighting from the Lighting Research Center at Rensselaer Polytechnic Institute and is Lighting Certified by the National Council on Qualifications for the Lighting Professions.
