Liter of Light

Liter of Light aims to provide an ecologically and economically sustainable source of light to underprivileged communities around the world.

This source of light is based on a solar bottle, is easy to install and requires only simple technology and accessible materials.

To create the light, a plastic bottle is filled with water and some chlorine to keep the water clean. Then, a hole is made in the roof of the household to install the bottle - half outside half inside.

The daylight that enters from above gets diffracted by the water and spreads the light into the room. During the day, it substitutes a 55 watt light bulb completely.

The solution also works when the sky is clouded. The bottle will shine less brightly, but there is still enough light getting inside the bottle. The impact of installing these solar bulbs goes beyond providing light, as it can help improve quality of life for families by creating extended indoor working hours while reducing households' carbon footprints.