Waterproof to 500 ft (do you have a card for that?)
Bulb life is 20 times longer than halogen or xenon
True color fidelity - approximates the color temp of the sun
10-watt lamp rivals the brightness of 25-watt incandescents
Lamp: HID Metal Halide
Burn time: 3-4 hours (alkaline batteries)

If you are interested, I am asking $115. They have been selling on e-bay higher...