Innovative 500 Dives Flashing Water Activated Marker Light

I have a couple of these lights and they work great! They're better than cracking a glow stick every time I go night diving and my buddy can spot me out of the group because of the bright flashing green light. The material they're made of also glows in the dark for extra visibility. Although the light is constantly flashing it's not as annoying as you might think. It flashes just enough to be visible from a good distance. After the dive I shake the water off to deactivate it and it's ready for the next time I go night diving. I could see this being used for other water sports too, but it only flashes when the light is submerged or there's enough water to bridge the gap between the wet connects. Licking a finger and bridging the connects on the bottom is an easy way to tell if it's still working on the surface.Hope that helps!