THIS EXPLANATION FROM THE RED FERRET VIA CARPE DIEM:
A huge part of this planet exists without access to reliable electricity, which doesn’t just mean no access to computers and other tools, but a lack of even the most basic of necessities such as cheap lighting.
Most of these places still rely on kerosene lamps, which are smelly, polluting and expensive to run.
There are some superb initiatives happening around the world at the moment to solve the problem, and we think this new project could be a real winner if it takes off as hoped. The GravityLight uses a clever belt and pulley system to generate light through the force of gravity. The idea is for the user to pull a bag up to generate enough energy for short periods of light. Because it uses ultra low power LED bulbs, this could mean up to 30 minutes of light for a quick 3 second hoist. It’s much cheaper than solar (which needs batteries to store the sun’s power) and easier to maintain than other more complex devices...
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