I used to have it in my 10 gal
. It worked fine for that size tank. But, it is not as bright as a 32 W T8, even though it consumes just as much energy. So if your tank is big enough (ie 48"), you might want to go with regular T8's, which will put out 3x the light for same watts.
As far as color goes, you might want to put in a "regular" bright stick in the mix (if you want to stay with the bright sticks). The regular one is more bluish & balances out the more yellow "plant" one.