If you're talking about the Halcyon focus, I just dove several days in caves with someone who has one. I don't know if hers is the older one, a newer model, or what the difference is. But I would say that I was pretty unimpressed with that light. I wouldn't buy one. The spot is an ugly, yellow square, and it's just not very strong.
If you can tolerate a short rant on my part, I want to say that I am still looking for a light that is as good as my old 21W light monkey HID. That light was a great color, excellent focus, very powerful, overall fantastic light in a cave. The problem is the bulbs can break, the ballasts are almost nonexistent anymore, the reflectors are fairly big, the burn time is not as good. IOW, every aspect of cave lights has improved with LEDs, EXCEPT the overall aesthetic quality of the light itself. Unfortunately that's a really important thing.
Uggh...