I've got a review available of the Alpha with 4500K Neutral XM-L, with Cerakote laid down on top of the regular ENP finish. Beamshots, video, runtime graphs, and much more are all available in the review thread here. The review is currently about 3/4 complete.
If you're in a hurry, you can just watch the quick video summary:
Just a great light. You cannot beat the value considering the work involved. Love the Cerakote. I have shot Duracoat on a lot of firearms in the past and the Cerakote seems to offer a much harder surface. Great product.