night be a total noob question .. about leds ..

[yogoshio]

Oh good, Kevin's here And to further qualify your statement, LEDs have been in use for decades in this hobby, and longer in industrial use. The quality control for these products goes farther than you claim, and if LED wasn't putting out a long lasting source, then manufactures wouldn't have converted them into use in this hobby. LEDs have gotten to their 5 year life expectancy, which by then the lights diminish less than the 6 month life of T5's and halides. The studies and experience is out there.

 

[Kevin Says]

Oh good, Kevin's here And to further qualify your statement, LEDs have been in use for decades in this hobby, and longer in industrial use. The quality control for these products goes farther than you claim, and if LED wasn't putting out a long lasting source, then manufactures wouldn't have converted them into use in this hobby. LEDs have gotten to their 5 year life expectancy, which by then the lights diminish less than the 6 month life of T5's and halides. The studies and experience is out there.

Read this article - http://apps1.eere.energy.gov/buildi...ssl/led_luminaire-lifetime-guide_june2011.pdf This was published about a year ago. From the article -

Surprisingly to many, the true reliability and lifetime of light-emitting diode (LED) lighting systems
is generally not known. Even worse, lumen maintenance values of LED devices are widely used as a
proxy for the lifetime of an LED lighting system, which is misleading since lumen maintenance is
but one component of a luminaire’s reliability. In fact, quite often the lifetime of a well-designed and
manufactured luminaire is not determined by LED lumen depreciation. For many manufacturers
estimating the luminaire lifetime using LED lumen maintenance, results can be ascribed to
dependence on readily available numbers without developing actual luminaire data. In many cases,
neither product providers nor customers are aware of the differences.....

I would like to know your sources for information - especially your claim that it has been used in the industry for decades and LEDs have gotten to their 5 year life expectancy.