I just found this newsgroup and perhaps this question has been asked many
times...
I did my research on plants and purposely chose plants that will do well
with less light, and they are doing fine at this time. My tank is only a 20
gallon tall, but would like to know the best/brightest fluorescent bulb you
can get for a 20 gal hood. I know color and brightness can make a
difference. I can only have the one bulb as I am unable at this time to
upgrade anything but the bulb. Thanks