If I started a vertical garden, 16 plants in a 4x4 area. What lights would I need? I'm getting told Cobs, hps, mh, cfl, cmh.. a bunch.
Would I need to use 600w, or 1000. Would 2x 400w work well? What is the most efficient? Would I need a Cool tube to keep the temps down?
How can I expect this...