The Illuminating Engineering Society (IES) of North America recently approved TM-21, an industry standard for determining lumen maintenance prediction.
Predicting the true life of an LED lamp continues to be one of the significant challenges faced by potential customers of the energy efficient technology. Currently, most prospective LED fixture customers rely on LM-79 and LM-80 data to evaluate potential products. These data provide an industry standard for lumen maintenance for SSL systems and LED components.
For more read the New Streetlights article...
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