XPost: uk.rec.driving   
      
   On Tue, 23 Apr 2013 11:10:27 +0100   
   Dave Plowman  wrote:   
   >Pulsing an LED is a way of getting a higher light output from it without   
   >overheating. Overheating an LED kills it in short order. Seeing a flicker   
      
   Its odd though isn't it. The way they're constructed must mean the amount of   
   heat generated for a given voltage or current must slowly tail off so although   
   they'd heat up too much at constant voltage X you can pulse them at for   
   arguments sake X*2 producing the same or even more total light but without a   
   doubling of the heat generated so allowing for cooling down to safe levels   
   during the OFF periods of the pulse. Or something like that.   
      
   NJR   
      
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