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ANSI/IES LM-79-24
Approved Method: Optical and Electrical Measurements of Solid-State Lighting Products
Procedures to be followed and precautions to be observed in performing reproducible accurate measurements of total luminous, radiant, or photon flux; electrical power; system efficacy; luminous, radiant, or photon intensity distribution; and color quantities and/or spectrum of solid-state lighting (SSL) products for illumination purposes, under standard conditions. Changes have been made in this new edition to update information and provide better guidance based on information gathered from proficiency testing associated with laboratory accreditation and independent research.
Illuminating Engineering Society of North America [iesna]