Yes they do. Look at some cites for different sites.... They make all sizes for CP, T5, and MH. But I would suggest T5 for that size. Plus they are cheaper. I have been reading up A LOT on lights. I just got into corals and need a new light. Metal Halide is good for a DEEP tank. There are to many down sides to use those for a small tank. They are expensive, produce tons of heat, and drain your energy bill. Compact fluorescents are good for small tanks, but you can get a T5 for close to the same price and are better.