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by kibwen 1951 days ago
Grow lights are quite good at only emitting light in certain parts of the spectrum, and have been for some time now.
1 comments

Just looking at some spectrum charts for grow lights... They certainly vary, but not in any uniform fashion.

There is an exception to this: there is a standard LED graph which shows up quite frequently, identified by it's peeks in the deep reds, yellow, and dark blue, with a marked trough at cyan.