I use a black and decker plastic tool cabinet with adjustable shelves with a 250w hps mounted in the top. it's about 6' tall 20" deep , 2' wide. it's kept me in supply but I've wanted to grow more and will probably have a small vegetative cab under cfl's to speed up harvest rotations. If you only intend to grow for personal use, it's a good setup, and a 400w hps would be ideal if you can keep it cool (between 75 and 85 F)