On Oct 26, 2007, at 12:49 PM, Hoyt A. Stearns Jr. wrote:
Perhaps there's a thermoelectric (Peltier) heat pump effect. There areobviously junctions between different conducting materials.
An interesting control experiment would be to power the LEDs with ordinary DC and see what kind of heat they generate.
Horace Heffner http://www.mtaonline.net/~hheffner/
