> I have also seen white LED that are
> capable of being used for exposing UV film on PC boards so those LED
> have to be outputting some UV as well.

 Photon energy increases with decreasing wavelength. "Royal Blue" is
energetic enough to do much of what UV does.

Note use of blue LEDs to cure dental fillings.

The most efficient blue LEDs how have over 1/2 the DC input energy
output as light.



   Russell
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