GRAVITYLIGHT

The GravityLight uses a weighted bag which is attached to a hook to power a generator. This produces a tenth of a watt - enough to power an LED light and two smaller lights. Depending on the height it is installed at, it can produce 20 to 30 minutes of light before the weight needs lifting again using the rewind cord.

The generator produces just under a tenth of a watt which powers an LED light on the unit itself and two smaller satellite lights that can be hung over a desk or bed.

Imagine the millions of people in foreign countries that don't have electricity, and they use non clean or renewable light.

ELECTRICITY IN THE WORLD

KEROSENE LAMPS

WHY KEROSENE IS BAD

• The fumes are as bad as smoking 40 cigarettes.
• The cost of Kerosene is a poverty trap.
• Fire, in India alone, 1.5 million people suffer severe burns each year.
• Kerosene lamps is 3% of the worlds CO2 emissions.

SITES

• GravityLight.org/the-challenge/
• http://www.dailymail.co.uk/sciencetech/article-3100777/The-light-powered-GR...