I think you want to add around 160 watts... I would go with PC lighting. Half actinic/Half daylight. But if I were you, I would forget the anemone and invest in something else. Anemones, as NMreef said, don't last long in most home aquariums because most people don't know how to properly care for them. Some people have had suscess in keeping them alive for years but that's pretty rare. These awesom creatures, (quoting NM again <img src="graemlins//silly.gif" border="0" alt="[silly]" /> ) should be left in the ocean.
Galina