the tip is to feed the tank during the day, so that it comes out when the lights are on...eventually, it will stay out all the time when the lights are on or at least when you are feeding. i would keep it out of direct light though. these are one of the corals out there that still look awesome without direct light hitting them.
i have a black sun coral in my sump right now that was given to me to rehab (it's a little early for me to rehab anything since my tank is so new, but it was failing in the other guys tank, so i said i'd give it a shot).
right now he's getting used to being fed at night when the sump light is on, but not aimed at him.
this is a flash pic however....