OttawaGreen
Well-Known Member
No magic number is ideal. Every led is different and every grow area different. If 18" gets you full coverage then great. What about 14" does that get full coverage? If so, then that is more ideal that 18".
Easy way to check brightness if you don't have a meter is to put a sheet of white paper or something in the grow area to compare brightness levels from the middle to the edges. Light levels should be fairly bright to the edges.
Easy way to check brightness if you don't have a meter is to put a sheet of white paper or something in the grow area to compare brightness levels from the middle to the edges. Light levels should be fairly bright to the edges.