Chuck Harris wrote:
White LED's are funny devices. As I understand things, they are actually
blue LED's with a phosphorescent component added to the plastic of the package.
The phosphor is what makes them radiate white. I have a suspicion that filing
them may damage the color. Old fashioned GaAs LED's dispersion can readily
be improved by filing the end of the lens.

Yes, you can't file the whole lens off, but you CAN rough it up with a bit
of sandpaper to create a diffusing surface. You don't want to take any more
material off than you have to.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."