I have a large frag (3"by3") of bright canary yellow, thin, turbinaria Yellow Cup Coral with small polops. I know each type is different, so i'm looking for recomendations on light requirement. It seems to open its polops more in fairly low light and much more under dim actinic lighting. Is this because this type of turbinaria is a deep water, lower light specimen, or because it opens its polops at night, and low light is almost night. Does anyone know? I've had the coral for about 2-3 weeks, is it still sensitive to light? What do u guess is going on?