I was thinking of purchasing the latest radion light fixture from ecotech which is the G6 pro. But my question is does anyone put them over a rectangular tank? I have a 29 gallon that's 30" by 12" by 18" and the radion g6 pro has a 36" by 36" light spread. I feel that if I bite the bullet, I will have a lot of wasted light. Currently I have 2 T5 HO lamps which are a pain to change since their ballasts are very fragile. Any thoughts?