The lighting routine does not need to be altered but depending on the intensity should run about 12 hrs/day. An anemones health is best guaged by it's color and if the mouth is tightly closed or not. In the beginning at least they will roam a fair amount until they properly acclimate to the tank and find the right spot.
What kind of anemone, what lighting do you have and how old is your set up?
Cheers
Steve