Yeah ! the t12s are pretty good and bullet proof ,lasting years . Maybe I'm cheap and try to yard sale parts or online but I really do like the lighting of those bulbs . just picked up a two bulber48" at a garage sale for 5 bucks and it kicks butt on the t-5 and my catalina aquariums .but I would imagine they are being phased out also ace hardware or home depo still have some .The aquarium stores around me still have some .GOOD LUCK :fish:
LED lighting technology is changing so rapidly that you are probably better off waiting a few years. Fluorescent is still much cheaper in terms of the up front costs and the pay back on the energy savings for LED takes years. And that's assuming that the LED fixture doesn't fail which often happens with new technology.
Waiting a year or two before switching to LED will probably get you a better fixture for a lower price and you won't have buyer's remorse.