Q:- Is the lumen maintenance percentage a lifetime metric?
No. The possible percentage filed on the LED Lighting Facts label explain the lumen maintenance the quantity of light remaining after a particularized time, distinguished to the basic output of the LED light point of supply while performing in the thermal environment of the lamp or luminaire. SSL Solid-State Lighting lifetime and accuracy , by contrast, take into account the performance of additional system factors over time, containing electronics for example. The power supply or driver, for example. Lenses and reflectors, thermal management system, housing, & accompanying components.
There is no Market standard procedure for calculating or judging the lifetime and/or accuracy of SSL Solid-State Lighting products, taking the whole system into account, though some manufacturers have their own procedures for performance so. LED Lighting Facts uses Company standard testing procedures whenever attainable to make secure apples-to-apples comparisons of product performance.
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