{"items": [{"author": "Charvak", "source_link": "https://www.facebook.com/notes/jeff-kaufman/saturday-november-29-2008-ticket-to-ride-led-bike-light/394228536212/?comment_id=10152649768881213", "anchor": "fb-10152649768881213", "service": "fb", "text": "I like the 12 gauge copper wire heat sink idea.  I use aluminum planes as heat sinks for my LED projects, but have found that they're not conductive enough to assume constant temperature across the entire metal area.  https://www.facebook.com/photo.php?fbid=10100107275181478  I had expected the metal-air boundary to be far more resistive to heat transfer.  How did the copper wire heat sink treat the LED after a year of use?", "timestamp": "1428461481"}, {"author": "Jeff Kaufman", "source_link": "https://www.facebook.com/notes/jeff-kaufman/saturday-november-29-2008-ticket-to-ride-led-bike-light/394228536212/?comment_id=10152650335306213", "anchor": "fb-10152650335306213", "service": "fb", "text": "@Charvak: It was still working well when I stopped biking to work after moving closer. I didn't notice any degradation. I used it for about a year.", "timestamp": "1428495629"}]}