GravityLight is an innovative device that generates power using the force of gravity from a weight. Made up of three parts, the light is hung above the ground giving the weight component a 6ft drop. To power the light the weight is lifted, and on release starts to fall slowly back down towards the ground. This movement powers a series of gears which rotate very slowly with high torque (force). The gear train running through the product turns this input into a high speed, low torque output that drives a power generator at thousands of rotations per minute. This output is used to power an LED light, and ancillary devices, providing off-grid communities with access to energy.

The GravityLight Foundation is a charity with a mission to:

- relieve poverty caused by lack of access to electricity and reliance on kerosene for light
- protect the environment through providing clean, off grid alternatives to kerosene lamps

They do this by designing, developing and selling clean, affordable off-grid products, the first of which is GravityLight:
a unique off-grid light powered by lifting a weight.

GravityLight provides instant, limitless light - independent of sun or batteries - all you need are rocks or sand!