Okay...so here's the deal. I've decided to ditch the four foot rack and get a five foot rack. If you notice the tanks are a little tight on the middle shelf. I've got the extra foot inside the closet so I'll have enough room. This would also allow me to upgrade the Azureus tank to a 40 breeder which would give them more floor space. I'm guessing I'm gonna go with the CFL lights.