[yale @ Feb 13th 2007 10:41PM]

you are aware taht LEDs has a life of like 100-150yrs before they even start to dim right?

[Mantari Damacy @ Feb 5th 2007 11:40PM]

1. It is reasonable to assume a 100,000 MTBF for an LED. That is 11 years of constant use.
2. But that's a _MEAN_ time between failure. Not a guarantee.
3. A 47" TV could easily have 100 LEDs.
4. You're betting that all LEDs will follow the mean. Guess how many are going to fit outside of one standard deviation? Two standard deviations?
5. If you've had enough LEDs, you'd know that some *will* fail prematurely. Ask people who have run a number of LED christmas lights for two seasons.
6. Another example: one of the Aqua Teen Hunger Force LED displays on eBay? Did you see the one where a bottom LED was burned out? It happens more often than you'd like.
7. LEDs put out less light as they become older
8. White LEDs fade even worse as they become older because they put out UV light which hits against a white phosphor coating. That coating luminesces less and less over time.
9. Other issues can impact LED lifespan, such as heat.
10. A failure of a single LED will be apparent and will create a dark spot in the image.

I like LEDs myself, but experience is a cruel teacher. An expectation of 100 years before they dim is outrageous. Go to PlanetChristmas and ask them about how their LED based Christmas lights seem less intense when it comes to a second season.

[horngreen @ Feb 17th 2007 4:42PM]

I want the 10 foot version that outputs only 100 watts.