Philip’s L Prize LED bulb Passed DOE’s 18000 hours Test

On August 7, DOE has released a new report to announce Philips L Prize LED Bulb passed 18000 hours test. And from the test, DOE also gets a piece of more true prediction material on lumen maintenance ratio.

200 samples are tested. The test is under the constant temperature of 45 ° C, and uses mobile integral ball to measure spectrum. According to the test data which is watched at 7000 hours, the lumens maintenance ratio of L-Prize light bulb will be 97.1%, when it lights by 25000 hours. And the possibility reaches 95%, exceed general requirement(70%).

Until July 2012, its total measuring time reaches 18000 hours. The new results as following:

The changes of light output are minimal;

Delivers a chromaticity change of less than 0.004 relative to the CIE 1976 color space

According to the latest data predict, the Philips lamp will deliver 97.1% lumen maintenance at 25,000 hours.

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