1nitrous
Member
you mean going over 16 inches not under 16 right?I kept my 250w only 6" away from a canopy at a plant that was LST'd down to 8" tall, ony 1.5 gal pot. They penetrate! haha. Im guessing though you could could get a good 12 inches of good light penetration. I wouldnt bother going under 16" unless you have side lighting.