MIT developed the idea and it’s now being implemented in poor homes in the Phillipines. Fill a plastic bottle with water and stick it in the roof. It provides a surprising amount of light.
2 thoughts on “Light in homes from plastic bottles filled with water”
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Am I the only person that realizes this only works during the day? LOL.
Nevermind, I actually read the article and they’re solar bulbs that also use the sun to charge themselves. I suppose it’s ok depending on how much of a charge they can hold.