Revolutionary lights available

According to the data, GravityLight, a revolutionary lighting lamp that sold for only $5, was recently launched. The reason why it is called "revolutionary" because the lamp does not have a battery or fuel inside, simply rely on gravity to produce energy lighting.

Designers from London, Martin Riddiford and Jim Reeves, said that the purpose of developing such lamps is to replace expensive and highly polluting kerosene lamps. They have been developing this project for four years.

After spending $5 on this lamp, there will be no further costs. Each GravityLight kit contains an adjustable light and ballast bag. The installation is also very simple, users only need to fill the bag full of sand, stones or dirt, and then hang on the lamp, they can open the LED bulb. The energy produced by a bag of ballast is sufficient to support the opening of the lamp for 30 minutes. In addition, the lights can also be charged via solar panels.