That you don't have room for a window where the light happens to be is no excuse for not getting natural light. With the Solatube, you essentially periscope light through a zigzag, highly-polished metal tube, to emit as a beam of sunny goodness wherever you like. Natural light, being what our eyes were designed to appreciate, makes everything look better and makes you happier, and if you can buy happiness in a non-drug form, well, you'll be a man, my son. [GT]
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From: BEST OF 2008: Eco-friendy and sustainable shoes