I ran a 6 bulb ATI power module on one of my reef tanks with corals near the surface and none of them showed any signs of stress. You're more likely to burn you corals on LEDs than T5s I think. I think that 24" sun power will work great over your tank. The great thing about T5s is the all enveloping spread of light that it blasts out, as opposed to the near pin-point laser beams that LEDs throw out :-)
Dun dun dun.... Here are some gundam pics: not the best and clearest pics but they will do I tried to do it as fast as I could