are mate these bulbs are strictly for just rooting,iv got 2 x 600w metal halide for veg then move onto the hps for flower iv got a 2m x 2m tent with a 6 inch L sucking out and a 5 inch blowing in.really just for the thought of it i may aswell get a 240w cfl next payday.just tring to cut corners on the last finishing touches never goes down well