The cost of the light doesn't really tell us much but I am guessing its t5? How many tubes and what size tank? it is also my guess that this is a relatively new tank? I hate to say it but its not a good idea to buy things you know nothing about. It looks like a condy nem, which will probably never host you clown fish but it has been known to eat small fish. It is also a roamer and will sting corals that get in its way. Nems require pristine water conditions that are stable, any swing in temp, salinity and they will become unhappy. When nems die they can also wipe out your tank. Best advise I can give is please do research before buying anything for your tank.