you can veg your plants out longer if you'd like, just keep them at 18 hours, switch to 12 hours about a week before you want them to start budding ... I veg indoors 8 weeks, and flower, usually, 7-9 weeks more, depending on strain ... my cabinet is 7-feet tall, about 5 feet of growing room, when you figure in room for the lamp, pots, etc. ... and, I usually top my plants during veg ... I like a mature plant, with better yield ... :smokin: