Comments about Princeton Tec, Sport Flare:

Great for tying to the tank neck during night dives to help buddies see where you are. Also, I keep one in a pocket during all dives, just in case...

Comments about Princeton Tec, Sport Flare:

It's easier to find batteries than glow sticks!

Comments about Princeton Tec, Sport Flare:

Much better than I expected

Comments about Princeton Tec, Sport Flare:

With the rubber cone on the light, it makes a very effective marker light... somewhat brighter than a glow stick. However, I've never heard of a glow stick that failed during a dive. (If a chemstick lights when you snap it, it will run like it was advertised. If it fails to light [before your dive], grab another, they cost less than $[...].) If you hate throwing out chemsticks after every dive, the Aqua Flare is a good alternative. If your primary flashlight fails, you could pull off the ruber cone (even during the dive) and you'd have a light that's bright enough to at least read gauges. It's not a perfect light, but I'm completely satisfied with the one I bought.