How cool isn't this? A Brazilian engineer invented a light bulb made by only a 1.5 liter soda bottle, 1’x1’ roof sheet material, purified water, camera film dispenser, chlorine and a rubber sealant-and no electricity is needed.
I guess it is too cold and too dark for Nordic conditions though :-/
Read more: http://www.pinoybisnes.com/business-ideas/how-to-make-solar-bottle-light-bulb/#ixzz1fyYejCne
Nice Idea.
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hey! It is awesome.
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