In this maze of windowless tin shacks, school classes are often held outside because even in daytime it's too dark to see the blackboard. Now a youth group is hoping some 2-liter plastic bottles filled with water and bleach can brighten Kenya's slums.
The soda bottle-as-lightbulb was first discovered in Brazil by mechanic Alfredo Moser in 2002. In the decade since, tens of thousands of people who can't afford electricity or other sources of light like candles have converted to the water bottle lightpoint.
When the bottle is hung through a hole in the roof and filled with water and bleach, the bottle refracts sunlight and can produce as much light as a 50- or 60-watt bulb.
read more at source: The Associated Press
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