The GLO-TOOB for scuba divers

Originally developed for scuba divers, the GLO-TOOB is an LED light that is waterproof to more than 11,000 feet (!), measures less than 3 inches in length, and weighs just 0.075 pounds.

A replaceable 12-volt alkaline battery powers the GLO-TOOB; attach one to your tank and you'll be visible for at least 30 hours.

There are three different models of GLO-TOOB, each with different features, ranging from "always-on", to various flashing modes, to an infrared light.

Expect to pay around $30 for the GLO-TOOB. If you're interested, be sure to check out this, uh, glowing review at Dan's Data.

Source: www.divester.com