Originally Posted by
Sevo
White LEDs emanate much less UV than incandescent bulbs - for practical purposes zero. Their diode emission is narrow band deep blue (fluorescence converting that to some kind of white).
"Grow lights" (of whatever technology) have bigger problems than UV - they are designed to emit no green or yellow (as these are reflected by foliage rather than used in photosynthesis). On LED grow lights, the spectrum will be the original blue superimposed with a red fluorescent band - I'd expect them to deliver results similar to using strong magenta or lilac filters...
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