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| LED light falling on a moving fan will reveal the cycling of light http://greenmesh.com |
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(Lat/Long: 40.034859,-76.733705 accurate to within 3928 meters) |
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| LED light falling on a moving fan will reveal the cycling of light http://greenmesh.com |
|
(Lat/Long: 40.034859,-76.733705 accurate to within 3928 meters) |