A Light That Runs on Gravity (Sort Of)

Via Andrew Sullivan:

Technically, as some of Sullivan's readers have pointed out, the power comes from the human who lifts the bag of sand and hangs it from the light. Also, a spring-loaded wind-up mechanism would work by the same principle. But still, that's really damn cool.

  • muselet

    It’s cool, it’s cheap(ish), it’s simple, it serves a real need, and the mechanism may well be more efficient overall than a hand crank. Not bad at all.


  • zirgar

    It looks like an El Greco version of the space pod from 2001: A Space Odyssey

  • Draxiar

    Now that’s innovative and certainly advantageous for the villagers for whom it seems to have been designed for.