What are anybody's thoughts on a 48" Hybrid on a 72" tank (180) with 3 Kessil 360x? I have an opportunity to pick up a used 48" locally, but am trying to figure out the pros/cons. Not so worried about looks of the fixture as it will be hanging in a canopy. Basically, I'm looking to increase par a little and see what can be gained with T5's. Would it be worth trying the 48" or would the 61 be dramatically better due to its extra foot and wattage?