Re: [APD] If it's good for street light...

["S. Hieber" <shieber at yahoo_com>]

Not to pick too many nits in all the things you rightly
point out, but I think it worth mentioning that the process
for the super bright LEDs, while relying on fluorescence
isn't quite the same process in the glass bulbs. With the
bulbs, the gas, which includes vaporized mercury, becomes a
plasma when heated and that emits UV photons that cause the
phosphors to fluoresce. With the LEDS, there is no plasma
-- it's a solid state affair. It's a diff that doesn't
matter to most on APD, I would guess, but one that I find
terribly interesting. The incandescent is such a crude
device compared to the arc lights (fluorescents, MH, etc)
and LEDs. But hey make great heaters. ;-)

sh

--- James H <spreerider at gmail_com> wrote:

> super bright leds are also less efficient than flourecent
> lights, they
> work off the exact same principles but produce less light
> per watt. 
> sodium lamps are alot more efficient than flourecent so
> would use alot
> less power than a led version and i dont believe that
> these leds are
> putting out the same ammount of light as a 400w sodium
> lamp, probalby
> only putting out like 200w at most, or else you would
> need alot of
> leds, but i could be wrong with that, new technology and
> all.
> btw i design and manufacture led lights for underwater
> use with
> cameras (my favorite are the uv cameras and uv lights, i
> make a
> invisible spot light)
> James
> 
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