The solar Light Roll, by South Korean designer Ju Young Kim, is an easy to use alternative energy source. When you need energy, you hang the flexible panel out in the sun and the sunlight is turned into electricity via the solar cells and a power converter.
Covered in silicon cells on one side, when the solar panel is fully charged you can roll it up into a lamp and it lights the LED strip. Four hours of charging provides six hours of light from an internal storage battery.
Visit: http://www.juyoung-kim.com/project.htm
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