7bc75911   
   XPost: sci.physics, sci.electronics.misc   
   From: repownall@netscape.net   
      
   As Helmut said, you'll get different efficiencies depending how hard you   
   drive the LED.   
      
   Another thing to remember is "In theory, there is no difference between   
   theory and practice.  In practice, there is."  Yes, a PN junction is a   
   PN junction.  Traps, radiative recombination centers, non-radiative   
   recombination centers, light extraction efficiency, and any number of   
   other things affecting the ideality of LEDs and are why LED   
   manufacturers employ engineers and scientists to make their product better.   
      
   Bob Pownall   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)