I am sure somewhere on here there are recommendations on how close to place your LED's to the scrubber but I can't find any. I have this LED unit (soon to be 2 of them)

The LED unit contains 16 red LED's and 4 blues.
and this is my scrubber which is just 7" X 6"



I think maybe just 3" away or possibly less? The LED's are in a cluster in the middle of the reflector but are 120degree so spread should not be too much of a problem hopefully.
Thank's.