On Nov 9, 2011, at 11:13 PM, Mouse wrote:
White LED
lamps seem to have about the same phosphor lifetime as
regular fluorescent lamps.
You mean they're not white LEDs, but narrow-spectrum LEDs exciting a
phosphor such as is used in a fluorescent tube?
I was wondering how they got the flat spectrum....
Yup, that's the genius behind them. They're basically fluorescent lamps using an
LED as the UV source instead of mercury vapor. Though I'm told there are additional
tricks they employ to even out the spectrum now as well. Never bothered to look into it.
LEDs in general tend to emit an astonishingly narrow bandwidth, so getting white out of
them is quite an achievement.
- Dave