When can an Anenome be added?

[Gools]

A friend of mine wants to add an anenome to his tank. it has just finished cycling. It has been setup for a month and a half. It was started with Live rock, and filter floss from my tank, to start cycling. He has 1 marine glow 20w, 1 powerglow 20w, 2- 65w power compacts, on a 50g tank. he wants to add an anenome, is it seafe yet? I have no experience with them, so any imput. Thanks