Codes + Standards

IES Approves Updated LM-79 Standard / Test Method

One of the most important standards in the lighting industry is LM-79 that defines the electrical and photometric test methods for most LED lamps and fixtures. The IES has updated ANSI/IES LM-79-24 Approved Method: Optical and Electrical Measurements of Solid-State Lighting Products.

Changes have been made to update information and provide better guidance based on information gathered from proficiency testing associated with laboratory accreditation and independent research. The updated requirements in this test method are intended to reduce the variation of measurement results across testing laboratories while minimizing the burden on the testing laboratories. The method is based on absolute photometry addressing the requirements for optical and electrical measurement of solid-state lighting products.

The updated standard was not yet on the IES webstore, as of 6/26/24.

Image: IES (the LM-79-24 standard has not yet been posted on the IES webstore.)


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David Shiller
David Shiller is the Publisher of LightNOW, and President of Lighting Solution Development, a North American consulting firm providing business development services to advanced lighting manufacturers. The ALA awarded David the Pillar of the Industry Award. David has co-chaired ALA’s Engineering Committee since 2010. David established MaxLite’s OEM component sales into a multi-million dollar division. He invented GU24 lamps while leading ENERGY STAR lighting programs for the US EPA. David has been published in leading lighting publications, including LD+A, enLIGHTenment Magazine, LEDs Magazine, and more.


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