GravityLight.  How to illuminate with the force of gravity

Many people around the world do not have direct access to electricity. The reasons may be different, but obviously the common denominator of these people is always the same, they are developing countries. Today’s eco-invention attempts to provide low-cost light for many people, but it also attempts to find a solution to the excessive use of kerosene. This fuel is very harmful to the environment and represents a danger to humans, which today is used for extremely dangerous homemade lamps. The story we tell you is about a company called GravityLight, London.

Four people work at the GravityLight Foundation, while at GravityLight Kenya, three regional sales directors and several sales directors work in the field. GravityLight was created by designers Martin Riddiford and Jim Reeves.

What is GravityLight?

Gravitylight is an innovative device that generates light through gravity, it is capable of keep one on LED for 30 minutes.

The design is quite simple, it consists of a device with gears inside that passes a perforated plastic strap, at the end of which hangs a suspended weight of 9 kilos for 3 seconds. The slow slow fall, thanks to the force of gravity, of this , is what produces the electricity to keep the LED on. It can be hung anywhere, just put the proper weight for it to work.


How does GravityLight work?

The operation of GravityLight can be summed up in five steps.

  1. The weight is lifted by pulling a rope.
  2. The rope is released and the weight begins to slowly descend.
  3. This downward movement drives a pinion and a gear train which drives a DC generator.
  4. This operation can generate one to ten watts of power which is used for three lights.
  5. Once the rope has finished its slow descent and the weight has reached the limit of descent, all you need to do is lift the weight again by pulling the rope, and the system is operational again.
GravityLight.  How it works

What is your mission?

Their mission is to eliminate dangerous pollutants and expensive kerosene lamps, and to offer an affordable, durable and reliable system, the GravityLights.

Its price will suit the people for whom it is intended. The latest version of GravityLight was funded by a crowdfunding campaign.

What are the effects of kerosene on humans?

A typical kerosene lamp produces smoke equivalent to the breathing of 170 cigarettes in a year. Smoke from a kerosene lamp can cause respiratory illness, headaches, and nausea. It can also cause burns or fires in the event of an accident.

As if that weren’t enough, kerosene is the leading cause of child poisoning in developing countries, as it is often ingested by accident. Kerosene lamps are extremely expensive and for the poorest families they can cost up to 30% of their income.

And the effects on the environment?

The effects of oil on the environment are enormous. Kerosene lamps are responsible for 3% of CO2 emissions in the world and are a significant source of CO2 which contributes to global warming.

Where are kerosene lamps primarily used?

Kerosene lamps are widely used for lighting in rural areas, where electricity is too expensive for widespread use. Over 1.2 million people around the world do not have access to electricity. For this they use kerosene lamps … with all the ill effects we have talked about.

How much does a GravityLight cost?

In Kenya it costs $ 25 and thanks to our installment payment method an average family will only take 50 days to pay it off. After that, the lighting will be free.

How to make a homemade GravityLight.


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