Body-Heat Powered Flashlight!

http://gajitz.com/best-brightest-hollow-flashlight-runs-on-your-body-heat/

"Ann Makosinski, a 15 year old student from Canada, made a flashlight for her science fair project – a flashlight powered entirely by the body heat of the hand holding it. "

A 0.057 watt flashlight doesn't seem very bright. Maybe a trail light on a moonless night...

A 0.057 watt flashlight doesn't seem very bright. Maybe a trail light on a moonless night...

a warm tint, no doubt....

In a really dark situation, like a cave, fractional wattage would be a godsend. Incorporate some sort of storage device and you might really have something, especially if you could utilize the temperature differential between the inside and outside of a sleeping bag, or even clothing.