Roaming Long Tentical Anemone

[MMM33732]

My LTA keeps roaming. I'm not sure why either. They require good lighting right? I have metal halides, so I assume the lighting is sufficient. The way my aquascape is setup, theres multiple pillars, not a heap of rocks. The LTA always moves around at the bottom of the pillars and will occasionally climb up about 1/3rd of the way up, then end up back down again under a ledge where it tucks its foot away. It really never has more than a few tentical tips in contact with the light.. I doubt its too strong for it. Only 2 175w halides and 80 normal fluorescents over a 55g tank. Any clue as to why it keeps roaming? I have a suspicion its looking for more light, but it never climbs out from under a ledge where it would be able to get more light. It mainly moves at night too. Also, its getting frustrating ripping off corals that are glued down near it since it keeps moving... What happens if it touches a softy or LPS? would the sting kill the coral or just barely phase it? Will the LTA ever settle down?