just go hps, the parts are like $50 from local electric supply houses, it's not just how much light you have, but how intense, I am using 3 150w hps's (in a single hood), sure that's 48k lumens , but the intensity is only 15k; that's enough intensity at close range to penetrate even the bushiest plants i've had. just one 150w hps will blow your mind (with 1-2 plants at flower).