light leak's are gona cause your plants to hermi and pollinate them selves and produce seeds and using the same stale hot air without replacing it with fresh air will suffocate your plants and they will die....they are both very important why cant you do both
talking about mary-jane only gets boring when you ask the same question over and over
just the other day someone was asking my plants have been in 12/12 for 2 weeks now just started to bud what nutrients do i need to buy.....SERIOUS