sps lighting

[gregzz4]

With your tank being 2' deep I'd think you'll need an 8 bulb fixture, plus the width of 2' will be hard to cover with a 6 bulb unit
I use an 8 bulb unit on a tank 19 tall and 18 deep

I love my 8 bulb T5 and wouldn't trade it for anything else currently available, unless I were to fall into possesion of some dimmable ballasts

I only change my bulbs every 12 months, not 6, or 9, and I spread out the changes throughout the year to not only offset the costs but to not shock the tank