Quote:
Originally Posted by ASV
a lot of white light LED are actually ultra violet LED shining through a micro dot florescent medium.
The medium will burn away over time leaving more and more UV and less white light. the amount of light being generated stays the same.
You just can't see it.
I believe this is caused by the relatively high intensity of UV
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I've opened a "burnt out" Feit (or otherwise identical) recently. It was just a bunch of 5630 LEDs fanned out in a circle on a flat piece of aluminum.
Unless the florescent medium is built in to the relatively tiny LED itself, they don't use anything like that.
Maybe the CREE ones do...they tend to have a large hump on top, rather than the totally flat 5630s. (I assued this had to do with spreading the light out)