I have an Icecap 250/400wt pendant in excellent shape with a Maxkor dimmable electronic ballast. It would be a perfect set-up over your reef. Set it on a timmer on low and a few hours turn the intensity up to simulate sunrise. This is a great light. The Icecap pendant will take 250wt and 400wt and is one of the best pendants made. Very durable and rust proof with a computer designed reflector to maximize light reflectivity.
Also included is a 20k bulb. Plug the pendant into the ballast, the ballast into your outlet and you have light. Just $225 shipped.
