Well lets see I have 4 inside a 4x4 tent and they take up pretty much the whole thing hehe :thumbsup: Then the room downstairs is roughly 12x8x6 1/2 and since this was the virgin run I only went with 10 buckets (came with 12) to see how things would go. I am currently planning on pulling a 400w cooltube from a cab I'm gonna retire and add it in the middle of the 2 600w with about 8 - 10 more buckets :jointsmile: Veg time depends on the plants. I avg 4 weeks but 1 thing I have learned is the plants will tell you what and when you just have to learn to see what they are telling you