Let us now begin with our first great idea.
GravityLight is a grand concept because of its simplicity. By raising a weight that is hooked to the cord of GravityLight, someone is then provided with electric light for up to 25 minutes.
The reason GravityLight is such an excellent concept is because it was an idea that should have been staring people in the face. For years many have worked to create clean and cheap light for underdeveloped nations. Most looked at solar or wind or even generators run by fires. And all the while we walked in a source of unlimited power. The gravity of our own planet. GravityLight uses a universal power-source that is present anywhere. All it takes is a few calories of effort to raise the weight and recharge the light for another half hour.
The GravityLight is an elegant solution that has solved a very old problem. And it leaves open potential for so many other applications. It could possibly charge cellphones or even be taken to Mars to light the landing capsules of astronauts.
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