What Real Lifetime For LED Bulbs?

Some LED bulbs have lifetimes of more than 30,000 hours, compared with 1,000 hours for incandescent bulbs. LED Engineering Development is currently conducting tests on the lifetime of LEDs to verify these forecasts. Lighting 24 hours a day and 7 days a week, 1,000 LED bulbs with more than 130 references are tested. The study is self-funded and independent.

”  The first results show that if you test a bulb for only 6,000 hours, you have no idea how the lamp will evolve  afterwards,” says Laurent Massol, director of LED Engineering Development.

Validation tests are currently only possible up to 6,000 operating hours, in accordance with Commission Regulation No 244/2009.This study shows that these tests are insufficient to validate the real lifetime of the LED bulbs.

In this study, less than 2% of all light bulbs are no longer working after 100 hours. This is indicative of a quality problem on a small number of samples. Other results are confidential at this time.

A Large Number Of LED Lamps Studied

More than 130 references, coming from more than 70 commercial suppliers, are studied at the rate of 7 ampoules by ledlightsclassified. This represents about 1,000 LED lamps studied. The study began two and a half years ago for the oldest lamps. All the tests did not start at the same time: some lamps therefore have more than 20 000 hours of operation, another 12 000 hours, and another 6 000 hours.

Measuring the efficiency of LEDs is more than just a measure of a lifetime! Each LED bulb is tested every 500 hours.Flow, efficiency, color quality and feed quality are tested at each measurement.

Other tests should follow: ON / OFF tests on durations of 1h or 3h on some 500 lamps. Rendezvous in some time for results!

Author: Matthieu Combe , founder of the webzine Natura-sciences.com

 

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