I am running 2 lights out of the 180 kit on a 90 , I know that is a little much!! I bought this kit because i plan an upgrade as soon as i get the floors done. The kit came with 60 degree lens and I have it at 20" above the tank. I am running my blues at 70% and white color and uv at 30%. I am just wondering what others are running them at. I am thinking of bumping them a little but do not want to put too much light to the tank. I suppose I could just lower the light a little and pick up some par. I really like the spectrum I have now just looking for recommendation's.