You want the 22" Reptisun so that there can be a gradient so it's not constant uvb all day long. You would put the UVB light to one side with a basking light along side it so that the UVB is about 12" from the basking spot and the basking light gets the basking temp to 100-105. UVB should be under any screen unless you can get it 10"from basking spot.
Don't bother with the t8 fixture and just go straight to a t5.