Bell-Southcn is ISO17025 accredited by the International Accreditation Service (IAS) to perform IES LM-79 testing

The Illuminating Engineering Society of North America (IESNA) Approved Method for Electrical and Photometric Measurement of Solid State Lighting Products (LM-79-08) is a guide developed for the measurement of solid-state (LED) lighting products. It describes the procedures to be followed and precautions to be observed in performing various measurements for solid state lighting (SSL) products, such as total luminous flux, electrical power, luminous intensity distribution, and various properties of chromaticity.

In recent times, the term LM-79 Testing has become part of our lighting lexicon and has been treated in some cases as a lighting program all its own. While many lighting programs such as DLC and Energy Star reference LM-79 procedures, it is not in and of itself a lighting program with specified requirements and pass/fail criteria.

However, the term LM-79 Testing has come to generally be recognized as two distinct tests – a candela distribution test with an IES file, and an integrating sphere test for a standard color (CCT, CRI, Duv, chromaticity coordinates). Nevertheless, anytime LM-79 is mentioned in reference to desired testing, our staff will verify exactly what the customer requires since many measurement options are discussed in the official document.