Also, working 4 light is a hell of a lot easier than 20. I would suggest you get 3 600Watt instead of 4 400Watt, I would think that is more than enough for that space, less expensive also
SeedKing72 Reviewed by SeedKing72 on . 4 HPS 400w, or 20 double flouros ? I am upgrading from a dresser 3'x3', to a basement setup room 8'x7' what do you all think will produce the most in flower(will not be using room for veg) and will use the least electricity. will 4 hps 400w, or 20 48" double 40 what tubes? I prefer to have slightly less bud production in order to save a lot on power the math ive done made about 128,000 lumens for the flouros and about, 144,000 lumens for the 4 HPS 400w, for about the same use in electric. any thoughts? Rating: 5