I would also recommend that you look at products by Current USA as opposed to Coralife. Current USA is more reliable, and I have also heard that the lamps last longer too.
My reef has lunar lights on the fixture, and they are pretty cool. I enjoy looking in the tank when the lunars are on. Of course, a couple of nights ago I watched my mean old cleaner shrimp kick my new ricordia polyp off its rock. I need to invest in some super glue gel.