That's pretty low WPG, but you'll find that many people on here suggest that WPG doesn't really apply to Saltwater, and that's an outdated method of calculation for lighting requirements.
I had a pink tip under PC, and it walked around alot (sign of stress)...it would go all the way to the top of the tank (needed more light), and by your comparison I had 5 WPG. It wasn't enough. I recommend MH lighting before keeping an anemone, or maybe T-5 VHO lighting. Anyways, my fireclown loved the anemone. I just had to take him out of there 'cause he wasn't happy...the clown uses the Xenia colonies in my tank as it's host now.