IES Publishes New Documents for Solid-State Lighting

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The Illuminating Engineering Society (IES) has published three new reference documents regarding various performance aspects of LEDs.
TM-28-14 is meant to serve as a guide and overview for “sampling, test intervals and duration, and a method for long term luminous flux maintenance projection for LED lamps and luminaires using data obtained when [a] product is tested according to IES LM-84: Approved Method for Measuring Luminous Flux and Color Maintenance of LED Lamps, Light Engines, and Luminaires and LM-80: Approved Method: Measuring Lumen Maintenance of LED Light Sources. According to Rita Harrold, IES Director of Technology, “This standard [ TM-28-14] is meant to help both manufacturers, and users, and standards developing bodies to avoid burdens related to excessive testing by balancing testing time effort and statistical rigor.”
In addition to this guide, the IES has also published two new testing procedures for LEDs: LM-84-14: IES Approved Method for Measuring Luminous Flux and Color Maintenance of LED Lamps, Light Engines, and Luminaires, and LM-85-14: Approved Method for Electrical & Photometric Measurements of High Power LEDs. These documents help to establish the emerging body of standard and uniform laboratory testing procedures for solid-state light sources. LM-84-14 addresses lumen decay and color shift, while LM-85-14 addresses the optical performance of LEDs at higher power levels, which require higher operating temperatures.
All of the documents are available for purchase–in print or as PDF downloads–online from the IES store.

About the Author

Elizabeth Donoff

Elizabeth Donoff is Editor-at-Large of Architectural Lighting (AL). She served as Editor-in-Chief from 2006 to 2017. She joined the editorial team in 2003 and is a leading voice in the lighting community speaking at industry events such as Lightfair and the International Association of Lighting Designers Annual Enlighten Conference, and has twice served as a judge for the Illuminating Engineering Society New York City Section’s (IESNYC) Lumen Award program. In 2009, she received the Brilliance Award from the IESNYC for dedicated service and contribution to the New York City lighting community. Over the past 11 years, under her editorial direction, Architectural Lighting has received a number of prestigious B2B journalism awards. In 2017, Architectural Lighting was a Top Ten Finalist for Magazine of the Year from the American Society of Business Publication Editors' AZBEE Awards. In 2016, Donoff received the Jesse H. Neal Award for her Editor’s Comments in the category of Best Commentary/Blog, and in 2015, AL received a Jesse H. Neal Award for Best Media Brand (Overall Editorial Excellence).Prior to her entry into design journalism, Donoff worked in New York City architectural offices including FXFowle where she was part of the project teams for the Reuters Building at Three Times Square and the New York Times Headquarters. She is a graduate of Bates College in Lewiston, Me., and she earned her Master of Architecture degree from the School of Architecture at Washington University in St. Louis.

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