RE: LED lights

[Barrie Robinson <barrie@look.ca>]

Theo,

Damn!  Now I know.  - Does anyone want my white LEDs ???



At 02:37 PM 10/2/2006, Theo Smit wrote:
> Part of the problem with using white LEDs behind a red lens is that modern
> white LEDs are actually blue, violet or ultraviolet LEDs with a fluorescent
> slug over top of them. The short-wavelength light from the LED excites the
> fluorescent material, which then radiates in the visible part of the
> spectrum, producing 'white' light with a bit of a blue cast to it. Putting
> that behind a red lens then throws away about 90% of the effective
> radiation, because the blue light and everything except for the red and
> nearly-red components will get absorbed by the lens.
>
> Pure red LEDs generate red light only, and all of it will pass through the
> taillight lens, with no wasted energy. Red LEDs will be MUCH better than
> white LEDs, and they are definitely brighter than the equivalent
> incandescent bulb especially if you're directly behind them.
>
> Best regards,
> Theo
Regards
Barrie

Barrie Robinson
(705) 721-9060 
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