I plan on having 12 plants in a 4x4 room, Mylar walls, ext.Should I use a 400 or 600. MH in vegi and HPS in flower.
Rule of thumb says 600hps is enough for 12 plants because its a little more than 7,000lumens a piece. Just wondering what you guys are thinkin.
I can get a whole 600 kit for...