pciszek: LasersHurt: This light has been hotly debated re: whether or not it was physically possible, etc.People began including calculations of the human power needed to raise the bag a few feet, however, and that's where the sensibility broke down and I stopped paying attention. Still, seems like it's easy enough to understand what goes on here.I just did a back-of-the-envelope, and it does not look good. If you had a 10kg mass (which is kind of heavy) and 2m drop, you could get one tenth of a watt for half an hour. Whoop-dee-do. And pulleys won't increase the amount of work available from a given mass and a given vertical distance. They would allow a human to raise a heavier weight, but I don't think this gadget is equipped to take advantage of that.
cgs06: These guys use 20kg and say you can get useful light at around 20 milliwattsLinkso I guess it's plausible... if not terribly practical IMHO.
Tom_Slick: uksocal: Why not also set up a pulley system, bag descends at .2mm/second and gives 2.5 hours of light? Am I missing something here?Now I want to go get a clock mechanism, crank LED flashlight and start playing.
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