Look at scientific negro i found, they are not all dumb. >

>>132853369
niggers did not invent that, moron.

GravityLight is a gravity-powered lamp designed by the company Deciwatt for use in developing or third-world nations, as a replacement for kerosene lamps. It uses a bag filled with rocks or earth, attached to a cord, which slowly descends similar to the weight drive in a cuckoo clock. This action powers the light for up to thirty minutes.[1][2][3][4][5][6]
Funding and development

The first IndieGoGo campaign of GravityLight was ended on January 15, 2013 with $399,590 funded by 6219 funders.[7]

The second IndieGoGo campaign, GravityLight 2: Made in Africa ended on July 18, 2015.[8] It featured an improved design and the goal of manufacturing them in Kenya.

Martin Riddiford and Jim Reeves worked on GravityLight as a side project for four years.[9]

2 blokes from he UK did, you faggot