I have the 3 mounted horizontally at 12" awl, my tank is 60 across and I want to say depth is 24"... I get no spot lighting at that height... With them pushed to 100% I was getting good par readings, I want to say 200 at sand bed... I would like to lower them to get more punch but don't want to get spot lighting.... If I added a forth then I could lower them with no worries... Which I might do if I go Vegas.... Upgrade the 3 and buy one more unit....

I also have my optics arranged to my rock work, 70s over the high points and 40s to punch down to the sand bed....