There definately are, but they will be lights that are really for smaller tanks I believe. If you are planning on keeping corals or anemones then you may have a hard time finding a light that will suit your needs. However I would say get measurements of the tank & see what size of light fixture you would need, then go from there & see if you can find lighting to fit on top. There is a bunch of retro-fit lights avliable & any metal halide pendants would fit over it. So I think you'll be good to go.