Gallery of Lights
Lamps => News about Lamps => Topic started by: rjluna2 on April 12, 2010, 07:00:03 PM
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Here is an article I found at TGDaily web site today. You can read it at GE's LED lightbulb lasts 17 years (http://www.tgdaily.com/sustainability-features/49331-ges-led-lightbulb-lasts-17-years).
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some more details can be found here (http://www.engadget.com/photos/ge-energy-smart-led-bulb/#2889324)
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Incandescent and fluorescent lamps have been around for decades, so we have pretty good collected data. the new cutting edge LEDs have only been around a few years. The lifetime estimate is only based on extrapolation and in my opinion, its guesstimate at best.
LM-80 testing protocol only calls for 6,000 hours of testing. The rest is purely extrapolated.
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Unfortunatly, it's to easy to trick the everyday american. :-\
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No LED lightbulb, can survive as high as the life of the LEDs themselves: 17 years.
This is because that the life of their integrated electronic driver (Or other electronics inside, in case of low voltage lamps), is much shorter than of the LEDs and is only several years average, and in the extreme case, it can be several months if poorly made.
The main failure mechanism of well made LED lightbulbs is "Ballast Electronic" and not LED degradation or failure.
Also, the heatsinking of this GE LED lightbulb, looks rather poorly made, meaning that the LEDs may even will suffice to degrade somewhat or stop working, before the LED driver (Or other electronic parts in case of low voltage lamps) will fail.