GravityLight is an innovative device that generates light from the lift of a weight.
Combining kinetic and potential energy, GravityLight works by connecting an elevated weight — filled with rocks or sand — to a pulley system that slowly powers a generator as the weight falls to the ground.
Over 1.2 billion people globally have no access to electricity and millions more have an unreliable supply. Instead they use dangerous, polluting and expensive kerosene lamps for light.
Collectively, kerosene lamps cause 3% of the worlds CO2 emissions and are a significant source of black carbon, with even more intense local warming impact.
Visit gravity light online for more info here: https://gravitylight.org/