the tubes dont have a great intensity, if you were going to use tubes at all you would want to have a ton of them and have them inches away from the plants... you'r better going straight cfl's I think... unless you have a ton of plants all at the same stage and you'd be willing to make a "bed" of tubes side by side... you'd want like 8... and you'd probably want T-5's... which are expensive... so if your going on a budget T-8's would be better than T-12's...