I have the one in the link below. As Dustin said they really make the corals POP...more so than any other lighting i've seen. Definitely only supplement/actinic only lighting. These will not work as moonlighting in my opinion because the corals stay open when the light is on...they really seem to like it.

http://www.thatpetplace.com/pet/group/3666/product.web

It's very well built. In fact, yesterday mine dropped in the tank!!! I thought..."there goes $70 down the drain! So, I rinsed it in fresh water, opened it up and dried it out for 24 hours. Plugged it back in today and works like a charm!!!