The Problem


Over 1.2 billion people globally have no access to electricity and millions more have an unreliable supply. Instead they use dangerous, polluting and expensive kerosene lamps for light.

kerosene lamp

A typical kerosene lamp is made by taking an empty bottle or tin can, putting a wick in the middle, filling it with fuel and lighting. Using kerosene for lighting is extremely inefficient, dangerous and expensive, and it has extensive health and environmental drawbacks.


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Collectively, kerosene lamps cause 3% of the worlds CO2 emissions and are a significant source of black carbon, with even more intense local warming impact.




Smoke from kerosene lamps causes respiratory problems. Accidental kerosene poisoning has potentially fatal consequences, particularly for children. Using kerosene inside homes can lead to devastating fires and burns.


The cost of kerosene is a poverty trap. Amongst the poorest populations, kerosene alone consumes up to 30% of their income.

How It Works


Combining kinetic and potential energy, GravityLight works by connecting an elevated weight — filled with rocks or sand — to a pulley system that slowly powers a generator as the weight falls to the ground.


Instant Light

It takes just a few seconds to lift the weight that powers GravityLight. Providing 20 minutes of light as it descends. 

No Batteries

No batteries mean that GravityLight can be stored indefinitely and there's no need to charge in advance, it's ready when you need it.

No Running Costs

As the energy generated from the device is completely self sustained, GravityLight pays for itself within months of switching from a kerosene lamp.


How we Work

We are committed to ensuring GravityLight is sustainable and scalable. We aim to create local jobs, skills and livelihoods in the heart of the communities that will be using GravityLight. 

Rather than undermining the local economy by giving away free products, we are working through sales agents and community networks. Flooding the market with free products can harm the local economy by undermining local businesses and livelihoods in areas where earning potential is already fragile. 

The GravityLight Foundation wants to boost the local economy by creating sustainable demand for clean, safe lighting solutions.

Through both our own field sales team and working with local partners in Kenya, GravityLight supports Kenyans to earn a living and learn new skills through selling GravityLights.


Organisation Structure

GravityLight Kenya Ltd is the trading subsidiary of The GravityLight Foundation.

This team leads the sales and marketing of GravityLights across Kenya, along with research into the use and impact of GravityLights - feeding this into future product development priorities.

If you are based in Kenya, please visit our GravityLight Kenya website to stay up to date with our latest news from our in-country team.

In parallel, Deciwatt Ltd a UK based company that forms the other half of our social venture.

Deciwatt designs and develops off-grid, clean energy solutions for emergency relief and a range of applications in developed markets.

A proportion of its profits go to the GravityLight Foundation to support the mission of eliminating kerosene lamps.