Wow, I don't know if I'm stupid or what, but that chart confused the heck out of me. I felt like a 5 year old starting at instructions on how to build a rocket ship. I know the t8 has to be pretty close, but I could have sworn I heard that a t5 10.0 reptisun has enough coverage that distance isn't really an issue, to a point of course. But having it mounted inside the enclosure on a 4x2x2 , would be no problem, or so I thought. Cooper, if I get a t5 10.0 reptisun, what would you recommend for a fixture? Is it just about the bulb? Will any fixture (like something at home depot so long as it takes a t5 bulb) work? If not, what's the best? And if it'sa fixture that has a reflector, will the reflector be good, or are there better reflectors you can get?