Light well from a plastic bottle, water and sunlight

Brazilian mechanic Alfredo Moser (Alfredo Moser), who in 2002 came up with a simple design of a light well from a plastic water bottle, is proud that he has not patented his invention . Thanks to Moser, such homemade lamps are now used in hundreds of thousands of homes in Tanzania, Bangladesh, Fiji, Argentina, India and the poor countries of the world, where people live in windowless cabins and electricity.

The idea is extremely simple. A hole is drilled in the roof into which a 2-liter plastic bottle filled with water is inserted. Due to the refraction of the rays in the water, the bottle effectively diffuses the light inside the room.


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Measurements showed that one two-liter bottle gives a luminous flux, similar to a 40-60-watt incandescent lamp.

If you fill up the joint with the roof with a silicone silicone sealant, then even during heavy rain, not a drop is leaking, says Moser.



In contrast to the enterprising Edison, the Brazilian inventor did not earn a cent on his "light bulb". He now lives in an unpretentious house and drives a 1974 automobile. But he has something to be proud of: light wells of this type are already massively installed in at least 15 countries of the world. Although it is unlikely that the author himself could have assumed such popularity of the simple proposed construction, but the fact remains. According to the director of the MyShelter Foundation, a charitable organization with the Philippines, by the beginning of next year, plastic water bottles will light the homes of about a million people: “Alfredo Moser changed the lives of a huge number of people, I think, forever,” he says.