[Phys-l] LED phosphorescence

[Jim Deane <jim.deane@gmail.com>]

>  A more cost effective method is to use UV or blue LEDs and
>  broaden the light spectrum using phosphors.
>
> What I am pretty sure is happening is that the phosphor needs  time to heat
> up before it emits light over a broad spectrum, the purple tinge  reflects
> the fact that the LED's being used are emitting UV light. I can't  find
> anything in the literature on LED lighting that talks about this, hence my  post.
>
> Bob Zannelli

I am curious, when you cut power to the LED array, does the array
continue to glow at all?  If so, what color?

It won't be a long-acting phosphor like they use in commercial
glow-in-the-dark materials these days, but it may have a residual
glow.

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James K. Deane
jim.deane@gmail.com
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