A Clever Lamp That Requires No Batteries, Outlets, or Sun

About a billion people live without electricity, and they often turn to kerosene lamps: ultra dangerous, carcinogen-spouting, open flames that could turn homes into tinderboxes. So a new Indiegogo campaign’s out to provide safe, reusable lights that need zero outside energy sources. It’s called GravityLight, and it’s kind of like those hand crank-powered camp lanterns you see at Bed Bath & Beyond, but instead of 10 minutes of manual cranking, the light is powered by gravity.