[jrreese]

Thanks so much Allen, You said in your article that one might decress the distance of the light source to the water to compensate for the lowering of intensity (par) with the age of the bulb. I was curious about what that distance should be, and it's effect on light source effectiveness. I have built a new hood with an incressed distance of the light source from the water and the tank seems to the eye to be a lot darker than before. So I was wondering about the effect it might be having on the corals, if any?