need help

[cle-cle]

can anybody tell me how far do the lights be from the plants i have a 400hps and a 400mh both on 18/6

 

[jash]

check the hid light distance charts: HID light Operation cost Calculator - Growing Marijuana Forum

 

[Dubbaman]

or you can put your hand on the plant top and if its too hot for you then its way to hot for them, mine is about 10 inches off the tops of mine.