I am currently using 2 150w hps and have them about 12-15 inches from my plant. I was going to lower them but I've noticed that the plants are growing quite well at this distance. through the next 2-3 weeks that distance will decrease drastically and I may even have to move it up a few inches. you may have to try a few hieghts but I'd say keep it further first then move closer to avoid damaging your plants.
ThaNemesis333 Reviewed by ThaNemesis333 on . light hight can anyone tell me what hight to keep my light from my plants ive got a 400w sodium and have heard to keep it 2 inches from the light at all times but that seems close to me or is that right :confused: Rating: 5