I dove the light in the deep, dark North Atlantic yesterday. 4 Dives between 99 and 111 feet. Very little ambient light.
I love this light. The Cannister is so small that you hardly notice it on your waist. This is a HUGE benefit compared to the giant cannisters of the past. I cant speak for battery longevity but as for burn time available with a new battery - I ran mine for right around 3 hours and no issue at all. If the advertised 4 hours is correct - then I will be happy.
The beam is PERFECT for what I need - a Very tight, Very bright hot spot that seems to cut through the murky water....AND - a nice halo without to much wasted light trickling to the side, but enough to see a good field of view outside of the hot spot. I couldnt have thought out a more perfect combination of tight beam with jsut enough light outside the beam.
I had a few guys comment about how bright my light was.
I do have a little moisture in the light head - but it doesnt look like it flooded - just a little moisture. I will watch it, and may be call Hollis/Light Monkey to see if this is normal.