http://www.wired.co.uk/news/archive/2012-03/09/230-percent-efficient-leds
Notice that this LED has a COP of 2.3… or 230 percent overunity. That implies “perpetual motion”. “However, while MIT's diode puts out more than twice as much energy in photons as it's fed in electrons, it doesn't violate the conservation of energy because it appears to draw in heat energy from its surroundings instead.” When it gets more than 100 percent efficient, it begins to cool down, stealing energy from ambient, which is exactly what must happen in any OU device, unless there is nuclear reaction pathway or another “supra-chemical” way to convert mass into energy. BTW - If photocells could be obtained which are ~70% efficient, then in principle, yjey could be mated to the LED for the proverbial “eternal light” … but the output is so low you would need a few million of them to be useful… but you get free air conditioning as a fringe benefit :-)
