O Wow… I love finding projects like this that think up of new cheap ways to power our world. The Gravity Light is a great idea that utilizes gravity as a power source for lighting for the poor and those who need it. This project starts out in Africa but I am sure if I really gets picked up then we can be seeing inventions like these all over the place. Gravity is a weak force but it is a force that doesn’t cause any emissions or wastes natural resources. As an alternative power source this will help open the market and people to power and maybe even radios and tools to build things anywhere in the world. I want to thank these guys for coming up with a brilliant idea and I will be sure to back this project!