The fixture will work, but the bulbs are the wrong spec for a reef tank. If you bought the fixture, then changed the bulbs, it would be ok, but 24" aquarium T5 fixtures are not that exp and already come with the rt bulbs (depending on what you plan to do) for an aquarium.
I suject checking on Craigslist in your area and see if you can find a T5 aquarium fixture that will work for you and most on CL do not cost alot if you find the rt person.