Hey, anybody use compact fluorescent light bulbs for their tank? My old incandescent brunt out so I was thinking to replace it with compact fluorescent. Is this a good idea interms of wattage per gallon and the fact that it's white light? I picked up a pack of 9 watts which equals about 40 watts as labeled on a package. Is that too much for a 5 gal or 10 gal tank both with a few plants in them? Thanks.