I'm running a 100 gal tank that's 20 inches from water level to sand bed. The lights are 9 inches from the water. I've got a mixture of SPS, LPS, Zoas and Rics, as well as a RBTA and some other softies...
I currently run 400 wt Hamiltons at 20k temp. They're kinda inexpensive bulbs. The question is: would running different bulbs be better for me? Could I switch bulbs without switching my ballast? Also, how do you know if your ballast is still good?
Thanks,
puntific