The anemone will extend itself towards the light when it is ready. Never try to move the anemone or interfere with it "settling" unless there is danger of it being damaged by a PH
or other equipment. As the others have said all you can do is play the waiting game.
Since it came from a lower lit tank, it may take a little more time to adjust to the new intensity. What color was the anemone when you purchased it?
What are your water paraameters and age of the set up?