GravityLight

Light powered by gravity

GravityLight

2013

gravitylight.org

1 in 7 people do not have access to electricity. With a growing world population, this number is projected to remain the same for the next 20 years. Without electricity, most of these people have no other option but to use kerosene lamps to light their homes, this means that over 2 billion people rely on carbon fuels like kerosene for light. Millions more have unreliable and sporadic supply, the electricity grid is growing but is not keeping pace with population growth.

GravityLight is a therefore venture. GravityLight doesn’t need batteries or sunlight and costs nothing to run. It takes seconds to lift the weight that powers GravityLight, creating 20 minutes of light on its descent.

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.

GravityLight can potentially eliminate the need for kerosene lamps, with huge environmental and economic benefits. GravityLight has no batteries to run out, replace or dispose of, and has no reliance on the external environment, time of day, season or weather. For families living on just a few dollars a day, kerosene lamps can consume up to 30% of their income creating an ongoing poverty trap. With GravityLight, all you need is a weight.

Our first GravityLight Indiegogo fundraising campaign raised almost US$400.000 in 41 days to fund the development and manufacturing of GravityLight trial units.

Light powered by gravity