OK
260 watts of PC lighting over a 55 gallon tank right?
I had pretty good luck with a 55 gallon and 360 watts of VHO, and I understand that thrive and survive are a bit different. However, I would say that you should be able to keep either a Bubble Tip Anemone or the Atlantic Condylactis anemone. Bubble tips are listed as a hosting anemone where as the Condy isn't normally placed in that category, but has been know to host a clown fish now and again.
Both should be able to survive under that lighting, as always more is usually better though.
Thomas