I put mine just below and to the right of my MP40, it moves a bit because of the MP40 as far as light its half way up the tank so 10 inches from the surface, I use T-5 6 Bulb Giessman Reflexx plus 1 Reef Brite Strip. HTH
I've got it on Logoon mode at 50 percent, , The leather get blasted, It's been in the tank less than a week in the same spot and has coloured up to a dull yellow and does have polyps just not fuzzy, Give it some time,