GravityLight is a revolutionary new approach to storing energy and creating illumination that is powered soley by gravity. The lamp uses no batteries or fuel and has no operating costs after the initatal purchase price of $5 making it a fantastic alternative to the expensive and hazardous kerosene lanterns, which are widely used in developing countries.
Created by London-based designers Martin Riddiford and Jim Reeves, the GravityLight uses a the bag filled up with sand, rocks or soil as a weight to turn the LED bulb on. It takes only 3 seconds to lift the weight which powers GravityLight, creating 30 minutes of light on its descent. For free.
Other uses: the GravityLight also can be used in garages, sheds or taken with on a camping holiday!