T5s are fine. You won't save any electricity, though. 8xT5s are 450 watts. 6x is 340 watts, or so. T5 are great lights, for sure.
I need a fan in the summertime, but right now, the heat is a blessing. Heat is an easy problem to solve if you want to solve it - it is only really a problem in July for a few weeks. I don't use a chiller, and have a few on hand from when I lived in the Midwest.