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Old April 26, 2018   #13
HudsonValley's Avatar
Join Date: Jun 2016
Location: Hudson Valley, NY, Zone 6a
Posts: 571

I had a similar problem my first year with grow lights. The worst-hit were the plants in white, shiny cups -- I remember thinking that the light reflected so strongly that it burned the leaves; the plants in dark green nursery pots were not badly unaffected. Moving the lights (T5s) to a distance of 6" helped, as did leaving the lights off for 8-9 hours/day.
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