I'm looking to set up a second grow area and have a 5 x 5 closet. I want to use fluorescent tubes but I'm having trouble finding the answers to my questions so I'm hoping for a little advice. I currently have a grow box in which I use CFLs and I understand my light spectrums but I don't understand the difference between the T5 and so on. Any advice or links is much appreciated. Oh yea, I'll be using 4ft tubes but I'm not sure how many yet. Thanks in advance!