Monday warm fuzzies (and science!): Gravity-powered lamps

Via Ars Technica:

Kerosene lamps are problematic in three ways: they release pollutants which can contribute to respiratory disease; they pose a fire risk; and, thanks to the ongoing need to buy kerosene fuel, they are expensive to run.

Approached by the charity Solar Aid to design a solar-powered LED alternative, London design consultancy Therefore shifted the emphasis away from solar, which requires expensive batteries that degrade over time. The company’s answer is both more simple and more radical: an LED lamp driven by a bag of sand, earth, or stones, pulled toward the Earth by gravity.

It always warms my heart to see awesome projects like this completely crush their goals on Kickstarter/Indiegogo etc.

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