Let There Be Light
Millions of people around the world can’t afford electric bulbs and live in homes that lack windows, resulting in lives spent mostly in darkness. However, thanks to a program called Liter of Light, many families in the Philippines will be able to afford light in their homes by a new innovation — old soda bottles now converted to solar bulbs.
Over 10,000 homes across Manila and Laguna have the solar bulbs installed. The light source improves the standard of living in the poorest areas. You can watch a story about the invention here.
A solar bulb is created by adding water and bleach into the plastic bottle and inserting the bottle into the roof through a custom-cut hole. The sunlight goes through the bottle and the added water refracts it, creating 55-60 watts of clear light in the home. The bleach in the bottle is used to keep the water clean of algae. The device can be built and installed in less than an hour and lasts for about five years. The idea is inexpensive for the financially-disadvantaged residents. It’s a practical combination of simple technology and reuse of disposed soda bottles.
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