Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Pretty amazing little light

I've had a Glo-Toob of my own for years, I use it while scuba diving and snorkeling. It's a great way to illuminate gauges underwater without blowing out your dark-adapted vision. They also can be clipped to a lanyard and tied to your scuba gear to serve as a marker light so other divers can more easily see you. Sure, one could use a chem-light / glowstick for this, but a Glo-Toob is SO much cooler! They're waterproof to something like 11,000 feet (not a typo, yes eleven thousand feet), and have a very long battery life.If you're like me, into gadgets and lights, spent less than $20 and get one of these cool lights!