New U.S. Department of Energy LED Fact Sheet on Lifetime and Reliability Rolled Out

U.S. Department of Energy (DOE) Lighting Program Manager Dr. James Brodrick sent out a recent fact sheet from his office on Solid-State Lighting (SSL) that speaks to just how important Light Emitting Diode (LED) lighting will be to the collective energy futures of building owners across the United States.

Dr. Brodrick recently told the Tennessee-based Edison Report that, "long life has been touted as a key advantage of LEDs, but understanding and communicating how LED products fail and how long they last can be challenging. The U.S. Department of Energy has come out with a new SSL Technology Fact Sheet, Lifetime and Reliability, to help users gain a better understanding of typical causes for LED product failures, the difference between lifetime and reliability, and methods for measuring and reporting lifetime and reliability."

The fact sheet points out that LED system performance is more affected by interactions between system components than most conventional lighting systems and the failure of any system component can lead to product failure.

The DOE concluded that the dependence of LED package performance on other components will continue to require that discussions about lifetime be focused at the luminaire, and not component or even lamp level, as lamp performance in different luminaires can vary.  Additionally, as with many performance attributes, LEDs have the potential to best other technologies in terms of longevity, but choosing the right product requires some understanding of expected failure mechanisms, lifetime, reliability, and serviceability, as well as asking the right application-specific questions.

Dr. Brodrick notes that the accurate portrayal of LED product lifetime and reliability is important for consumers, manufacturers, and the lighting industry as a whole.


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