The rule I would use when I was using HID's is; put your hand on your plant canopy back side up. Leave it there for one full minute. If the back of your had becomes unfortable, then raise the light. Keep doing this until your hand remains comfortable, and then add three inches to that distance. Keep that distance for 'your light in your grow space', as your plants grow. It worked well for me...Brussels
Thanks, but I know that. I mean how far from the ceiling as in the top part of a room. I just wanted to know for safety reasons............. I don't need to burn this motherfucker to the ground
Thanks, but I know that. I mean how far from the ceiling as in the top part of a room. I just wanted to know for safety reasons.............I don't need to burn this motherfucker to the ground