DOE Issues Guidelines for Conducting and Sample Test Results for Highly Accelerated Life Tests Known as “Hammer Testing”

While lifetime in LEDs is how long an LED lasts until it emits no light, it is the useful lifetime that is important. A number of organizations have come out with procedures that give a good estimate of average lifetime based on a test of lumen maintenance. This is used to estimate useful lifetime usually referred to LM-79. The DOE has published the detailed protocol for “Hammer Testing” luminaires along with an explanation of their usefulness and rational.

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