GravityLight: lighting for the developing countries

By: Therefore Source: http://vimeo.com/thereforeproducts GravityLight is a revolutionary new approach to storing energy and creating illumination. It takes only 3 seconds to lift the weight which powers GravityLight, creating 30 minutes of light on its descent. For free. Following the initial inspiration of using gravity, and years of perspiration, we have refined the design and […]