heres what id do, I have a sunhut oversized 4x4 (so 4.5x4.5) tent. Id put them, if you can fit em, in two galloon pots. Veg them, from seed, after they sprouted for a month or so, until they are about a foot tall. Just before that Id cut the top and do any sort of manipulating you want (LST< ECT) to get as many colas from each as you can. So, at a month they should be about a foot tall and the shape you want, and flower away. Id veg with the 1000 watt too tho, forget switching light.