While on the subject of anemone, I would suggest that you pass as you will not have enough light to support even an lta.....which though may require lower light than say a bta it does need to place it's foot into the substrate and are sand dwellers as opposed to a bta which plants their foot in a rock crevice. I have two ltas and one bta that I have had for 3 years now....all are kept under metal halide lighting and require only minimal supplemental feeding of silversides about once a month. Clowns do not require an anemone to host and in fact the natural host for an ocellaris is a carpet anemone which I would definitely pass on as it will eventually consume all the other fish in your tank and outgrow your tank in short order. Even if you were to get a lta or bta or even a sebae there is no guarantee that your clowns will even host in it. It took my two ocellaris 3 years to find the lta that they host right now and then it was only by accident that they discovered it. Most anemones you see are sadly bleached and are destined to die in the average tank.....they are very tempermental and require pristine water conditions and a mature tank with little fluctuations in parameters. If you do decide to get an anemone check out the following site for some tips....this is by far one of the best resources on the web for the care of anemones...
http://www.karensroseanemones.com/
Please dont say that as it is not even remotely true. Carpet Anemones are not hunters. They do not stalk anything. They take advantage of others misfortune. If hungry and if the creature that fell into its grasp is edible and small enough to be eaten they will eat it. But ONLY if hungry and the size is suitable for the anemone. They do not sit and wait for say a Yellow Tang to swim by and then lunge out and grab it.