They do best in med-high lighting. Depending on the set up it came from just be careful to acclimate it to a higher intensity by placing it lower in the tank and slowly raising it up an inch or two every few days.
Med flow is best especially near the top area of the crown. Just enough to sway the polyps. They crown has a nasty habit of collecting detritus if there is not enough flow around it and can cause necrosis. It also aids them when they shed. They do not typically open as nicely in high flow.
It's an extremely hardy coral and will accept a fair amount of abuse. Frags easily and in the right conditions growth increadibly fast. Try not to place it too close to other corals with strong chemical defenses or nematocyst. They are not well defended and will continually hybernate if so.
Cheers
Steve