These bulbs have their own ballast built in and I the wattage they
produce is alot higher than what they consume. For example, my 7 watt
bulb emits a candle power of 30-40watts (aprox).

Note that when talking wattage in the aquarium world, we're talking
fluorescent wattage. So your tank has 0.7 watts/gallon of light on it.

--
Victor M. Martinez | The University of Texas at Austin
| Department of Chemical Engineering
http://www.che.utexas.edu/~martiv | Austin, TX 78712
If we knew what we were doing it would not be called research, would it?