The World's Most Efficient Manually-Powered Light
GravityLight is a solution for anyone who can not access electricity.
The previous version of GravityLight is hanging something and generates electricity as it goes down because of gravity.
But the efficiency was not so good.
Nowlight is a new type of GravityLight, which has dramatically increased efficiency.
Nowlight has a cord looks like a big ring.
If you pull the front cord down, gears charge the battery inside of Nowlight.
If you pull the cord in just 1 second, the light will operate for more than 1 minute.
If you pull the cord in just 1 minute, the light will operate for more than 1 hour.
This energy is clean and safty.
Hunter: 
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