Princer,

What kind of bracing do you have on your 215? On my 180, I have a large glass brace in the middle (to guess has to be 15-20").

I've never owned a tank with a glass brace and the largest I had was a 58 gallon. I have no clue what the impact would be if I put a light directly over the brace or if it is even worth it. That was why I was leaning towards two, each centered over the open section.