Hey guys and gals, need your help - I'm looking for a link to a simple grow box, that's as small as possible - I know that's a common request, but I figure I can go about 4 feet high and 2 by 2 - enough for three plants, I'm hoping - how much light would I need, etc? I want to go as cheap as possibly, so if anybody has any good links, let me know. Thank you!