It is important to keep the dark period, 100% dark, no light leaks, no flipping the light on for 2min for a look, and no messing with lighting times.

What will happen is your plant will stress out. During the early stage of its life, expose it to light or stressing it out will give you better chance of a male plant, which produce no buds or THC. If your plant is on 12/12, you're going to hermie it, resulting in seeded buds and male plant matter.

Don't mess with the lights, stay on schedule and don't change around the lighting times. It will do more harm than good.
Nochowderforyou Reviewed by Nochowderforyou on . Light during 12/12 dark period, how bad is that? Mostly just curious how much of an effect does light during their dark period have on your plants? Like I don't think a little light now and then will hurt but what if you spent like three or four hours withj the lights on when it was supposed to be dark time?? Also wonder what happens if you change light and dark schedule ? Like going from say 8pm to 8 am with lights out then after a couple weeks changing it to like something like midnight to noon with lights out ? How important is keeping Rating: 5