Member discussion regarding the methods, varieties and merits of growing tomatoes.
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February 12, 2013
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#22 |
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Tomatovillian™
Join Date: Jun 2012
Location: Illinois, zone 6
Posts: 8,407
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Blue light causes cumulative irreversible degradation of human eyesight.
From UV rays, right? Metal halide bulbs are considered blue, but they have a coating that is supposed to absorb the UV. Does that sort of coating or filtering lens not exist for LEDs? |
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