In my 55USgal tank currently I have

2 x 55 watts (5300K) PCF
1 x 40 watts Philips daylight Ultra

This gives me 2.7 watts per gal. I have little space for one more tube light.
So please suggest me a 48" Fluoresent light.

Thanks and Regards
Dominic
http://www.dlink.org/aqua