The US Department of Energy released a report of its test of Philips' L-winning LED lights. The LED lamp provides illumination equivalent to a 60 watt retrofit luminaire and operates over 20,000 hours without failure.
According to the report, 200 samples of Philips are still running after 20,000 hours of operation. The initial output lumen maintenance rate is maintained above 100% on average, and the ambient temperature for testing is maintained at 45 °C. Based on the test results, the Department of Energy believes that the luminaire can provide more than 18 years of trouble-free lighting for the average household.
A report released by the US Department of Energy concluded that the energy cost per LED can be as high as $20, which makes Home Depot's $30 LED light more competitive.
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