Hey Ken. Shannon told me to talk to you about getting a new metal halide bulb. I have a 10k bulb thats kinda making my tank look yellowish. I wanted a new bulb that made it look more blue. Heres the info i have about the bulb itself: bulb:T9.5, Base: Fc2, Ballast: M80/E, Fixture rating: Enclosed. Its got pins at both ends of it. thanks, Sheldon the painter.