Hi guys, I got a secondhand enclosure with a single-bulb 36" T12 fluorescent fixture with magnetic ballast. Apparently ZooMed has discontinued their T12 bulbs and long story short, I need to put in a new fixture. I was planning to put in a 36" T8 fixture, but do you think those are on their way to being phased out, too? Should I just jump to a T5? It's an enclosure for a green iguana and her basking spot is only about 6 inches away from the fluorescent fixture. I am slightly concerned about TOO much UVB with the HO T5s.. what do you think?