I've heard that lighting a 10 gallon tank is diffrent then lighting a any other size tank. I read on a seperate forum that 4 wtts per gallon would actually be more like 2 watts per gallon. I just spent 100 bux on a lighting fixture for my 10 gal. Its a statelite CF fixture that puts out 40 wpg. 4 watts per gallon would be ideal for growing the plants i plan on growing. Should i return and get a fixture with even more power or is this just a myth? thank you for your time.