Light is the single most important factor. The general rule of thumb is
2 to 3 watts of FLUORESCENT light per gallon of water. A fluoescent is
5 or 6 times BRIGHTER than an incadescent, so a 60 watt soft white
incadescent would be much much too dim. 20 to 30 watts of fluorescent
light would be the best for a ten gallon tank. You can read more about
this he http://www.aquabotanic.com/begin.htm

Robert H
www.aquabotanic.com