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How To Use Progressive Web App aka PWA On 420 Magazine Forum
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The ballast I have has a knob with 4 settings... 600w, 750w,1000w and super lumens.I would let them grow quite a bit before putting them under that much light. When you do put them under it turn your ballast down at first. That way they dont get light stress. A lot of growers on here don't turn them all the way up until flower. If your using it for veg I'd run it 50%-60% then crank her up to 100% or 110% in flower if your ballast has that option.