Quote:
Originally Posted by JSH
The CREE bulbs were purchased 4 years ago at Home Depot for about $8 each. That was when 5000K (Daylight) bulbs were hard to find so I splurged and purchased them for the living room. (The rest of the house got 3000K FEIT bulbs for about $2 each)
The FEIT bulbs were purchased at Costco this year for $2 each (after about a 66% credit from Energy Trust Oregon) They are about $7.50 at Home Depot. I replaced all my 3000K bulbs with 5000K and gave the old bulbs to a friend that was still using incandescents.
The older CREE have a beefy heat sink / the FEIT do not.
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Wait, you said you replaced the 3000k FEIT bulbs with the 5000k Cree. The FEIT are the newer bulbs and the Cree older. But then you said you gave the old bulbs (Cree) to a friend, which would leave you with the newer 3000k FEIT.
Anyhow, the main thing missing is which are more energy efficient.
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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Is this still the most popular way to produce white light from an LED? The other method, and I believe is more efficient, is to combine RGB LEDs into a single package that gives the illusion of white light.