I am using Floyd's l2 great peice of kit the growth is electric green all over the screen im only on 8 hours a day. But last night had a brain wave to up the lighting its 16 on now I might have got a bit excited. LEDs are maximum distannce from screen and in the last 24hrs no burning of algae yet. One thing I might be doing wrong I clean the screen when it has a covering of green so I can't see the plastic mesh but should I be letting it grow thick if so how thick?