I'm using the 48" shop lights, 6 bulbs over a 115. I use 4 of the Plant and aquarium bulbs (they are pretty pink) and 2 deluxe daylight to hide the pink. Like Leopardess mine are pretty high above the tank in a homeade hood, But I think they are great. as far as cheap vs T-8 I bought the magnetic t-12's the t-8's were over budget at the time, but I didn't want the buzzing you often get with a standard ballast so I went with the in between model. The ballast type equates to noise and effeciency. The t-12's will light as well with either ballast. The magnetic ballasts tend to be quieter and cheaper to run long term. Either way they are a good idea for anyone DIY capable.