MIT physicists  have been testing a light-emitting diode that has an   
   electrical efficiency of more than 100 percent. You may ask, "Wouldn't that   
   mean it breaks the first law of thermodynamics?" The answer, happily, is no.   
      
   The LED produces 69 picowatts of  light using 30 picowatts of power, giving it   
   an efficiency of 230 percent. That means it operates above "unity efficiency"   
   -- putting it into a category normally occupied by perpetual motion machines.   
      
      
   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 electrically-efficient, it begins to cool down, stealing energy from   
   its environment to convert into more photons.   
      
   http://www.wired.co.uk/news/archive/2012-03/09/230-percent-efficient-leds   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)