18 hours on for vegging.
12 hours for budding.

Roughly, but that's all I use.
Opie Yutts Reviewed by Opie Yutts on . JUST WONDERING ABOUT LIGHTS HI ALL.. i grew some amazing smoke a good few years ago.but i cant for the life remember when the plants are only potted,do you leave the light on for 12 hours or 24 hours.. i,m growing 5plants,and have everything set up,inc a 400watt light.. any advise would be welcome..:) :hippy: Rating: 5