Gravity light

Gravitylight is a gravity-powered lamp designed through the organization decimated to be used in developing or 1/3-global nations, as a substitute for kerosene lamps. It makes use of a bag packed with rocks or earth, connected to a cord, which slowly descends similar to the burden power in a cuckoo clock. this action powers the mild for up to thirty minutes

The primary Indiegogo marketing campaign of gravity light become ended on January 15, 2013, with $399,590 funded by way of 6219 funders.

The second IndieGoGo campaign, GravityLight 2, Made in Africa ended on July 18, 2015. It featured an improved design and the goal of manufacturing them in Kenya.

Martin Biddeford and Jim Reeves worked on gravity light as a side mission for four years.

There are no operating prices after the initial purchase of the appliance. a general gravity light package comes with an adjustable lamp and a ballast bag. 

the mild may become on with the aid of filling the bag with approximately 20 pounds weight[10] (10 kg) and lifting it as much as the bottom of the device; the load falls over a period of 25 minutes, pulling a wire/strap that spins gears and drives an electric powered generator, which constantly powers an led. this creates sufficient energy to ultimate 25 minutes each time it's far needed.

The unique gravity light used a strap for pulling up the weight. the stepped forward gl02 used a plastic-bead chain on a pulley gadget. the pulley device calls for much less power to pull up.