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led optical efficiency Vs forward current

Hi all,
in a led, is it possible that the optical efficiency (lumen/watt) is
lower at the growing up of the forward current (If)? May you please
explain me ?


thank you


mauri
 
I

Ian Stirling

Jan 1, 1970
0
Hi all,
in a led, is it possible that the optical efficiency (lumen/watt) is
lower at the growing up of the forward current (If)? May you please
explain me ?

Yes.
For some types it is.
For other types it is not.
At high currents, more power is lost in the internal resistances.
 
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