crazy coral
 

So i recently purchased a large duncan coral from Blue water and it is doing something i have never seen a coral do. At night time the duncan comes out completely and seems very happy. I turn the lights on and still he seems quite pleased with life. I leave to go to work and come home at lunch to check and make sure all my new equipment is working properly and as i walk into the fish room i see that still the duncan is out and doing well untill........10secs later. Everytime i walk in the room the duncan coral hides as fast as he can. Is there any reasonable explanation for this? Today is his second full day in my tank i am thinking maybe he still acclimating/traumatized from his move????

He also seems to be opened up alot more at night......Lights to bright? All i have over the tank is 4t5's

any thoughts?