Athosanswered grow question 6 years ago Even if that might work in veg, although fooling around with the light schedule like that has a high chance of making plants go hermy, I don't think it will work in flowering, since you need at least 12 hours of continued darkness for the plants to flower. You need to vent the hot air out of that closet, not only for your plants health, but to avoid a fire hazard.