 during the dark period.
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@Budbrother is on point. 24/7 is too stressful…even for autos. 20/4 is what most use. I grow different from most using the gas lantern method. (13 on in veg.) I haven’t found the growth to be much different than long light schedules I used to use because I dial my lights to the right DLI and I never get stressed plants.
6" is probably too close if the light is any good @Jw8
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