http://www.coolest-gadgets.com/20080219/gravia-gravity-powered-lamp-wins-greener-gadget-award/ Playing with cool gadgets in the ongoing search for the Coolest Gadget Fri, 10 Feb 2012 13:53:47 +0000 hourly 1 http://wordpress.org/?v=3.1.3 http://www.coolest-gadgets.com/20080219/gravia-gravity-powered-lamp-wins-greener-gadget-award/comment-page-1/#comment-329823 DesignWithIntegrity Wed, 20 Feb 2008 22:59:22 +0000 http://www.coolest-gadgets.com/20080219/gravia-gravity-powered-lamp-wins-greener-gadget-award/#comment-329823 The conference organizers must feel pretty silly giving an award to such an utterly bogus bit of design. 50 lbs lifted by 60″ in Earth’s gravity gives a total energy of 346 Joules, or .025 Watt over 4 hours (that’s 0.1 W-hr). The best LEDs available today produce 200 lumens / Watt. What this all means is that Clay’s Moulton’s Gravia will run for about 1 minute, not for 4 hours. The conference organizers must feel pretty silly giving an award to such an utterly bogus bit of design. 50 lbs lifted by 60″ in Earth’s gravity gives a total energy of 346 Joules, or .025 Watt over 4 hours (that’s 0.1 W-hr). The best LEDs available today produce 200 lumens / Watt. What this all means is that Clay’s Moulton’s Gravia will run for about 1 minute, not for 4 hours.

]]> http://www.coolest-gadgets.com/20080219/gravia-gravity-powered-lamp-wins-greener-gadget-award/comment-page-1/#comment-329755 Gadget Thumbs Again » Coolest Gadgets Wed, 20 Feb 2008 11:47:43 +0000 http://www.coolest-gadgets.com/20080219/gravia-gravity-powered-lamp-wins-greener-gadget-award/#comment-329755 [...] Gravia Gravity-powered lamp wins Greener Gadget Award [...] [...] Gravia Gravity-powered lamp wins Greener Gadget Award [...]

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