Quote:
Originally Posted by Springerman
Just to be clear this is a UV light at 400nm. It is actually violet in the visible spectrum.
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To build on this a bit, the threshold for directly damaging ultraviolet light is well under 400nm. Aquarists commonly use violet LEDs in the 390-430nm range to accelerate coral growth as it hits photosynthetic and fluorescent peaks. LEDs are made to peak in a very small nanometer range, so the amount of harmful UV light is negligble.
You face more danger from household fluorescent bulbs than you do from 400nm violet LEDs.