I'm using a 400w iwasaki 6500k bulb with 2x65w true actinic 03 square pin csl power compacts. This is on a 65 gallon tank.
I have these on the very bottom because they weren't used to the light. I need to move them. When I got them they were pretty much just brown. Its hard to keep acros at top color in the store.
The first picture of the coral is approx 2 weeks after purchase.Here's another acro I got from aquarium fantasies
It is starting to turn a fluorescent green.
They are kinda pricey for frags and brown frags at that but I knew the 400w would pull them into orbit.