Alright, for my 55 gallon, I have 2 power compact bulbs running, 1 is 50/50, the other is actinic. I also have another lamp thingy running, and it has a big thick coralife 10,000k daylight bulb. Now, I am going to replace this bulb. Should I make it 20,000k also, or keep it the same? What do you think?