Your growing pretty much the same has i do when it comes to auto's i do 2 per light ,But with normal photo period plants i do ,one 600 hps per plant ,so a light per plant .That is to keep plant numbers down to has low has possible,i veg along side the ones in flower,so the flowering room is only ever used to flower ,again keeping the cost down .But still getting real good weights per plant 10 min 16 most of the time per plant dried weight.So i would try a t5 for veg ,the one i use is a 4 tube one around 1 1/2 ft