Here is a chart that should helphow far away should i keep a 70 watt HPS light from the tips of my plant?
thanks man. i have to make a new grow room though... because i dont have a foot of space lol so im putting it in my old gun cabnet and ill rig the lights in there about 4 and a half feet of room in there only about a foot and a half long (bottom wise) and 1 foot wideHere is a chart that should help