They are a pain. Very high maintainance. I would remove mine every night, put it in a bowl of tank water and feed each polyp cyclop eeze via a medicin syringe. After some time to take the food in, I would then return it to the tank. They are very pretty corals, but I gave mine away.
They don't "need" light, but putting them in the light will not hurt them. They are nocturnal, like most corals. If you feed them each "day", you can "teach" them to extend their polyps during the day time. I personally, was unsuccessful at this because I didn't remember or have time to feed every single day, but I have a friend who swears he did it.