T5 Light Spread

[Jaws]

I was just wondering what kind if linear light spread comes off T5's moving away from the end caps? I'm setting up a 7' tank and it's going to be primarily LED lighting but i'd like to add some T5's to give it a bit more pop. I'm just trying to determine if I should go with 2 banks of 36" bulbs for a total of 6' spread evenly or if I can get away with one bank if 60" bulbs. Thanks for your help.