1w & 3w High flux LEDs differentiation

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manishanand14

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Hello Everyone!


I did a mistake of mixing up 1W and 3W high flux LEDs.Now I am not able to differentiate between them.

Is there a way,like by measuring the forward voltage drop or something?
 

I would think that the forward resistance of the higher power LEDs is lower then the others. LEDs drop ~2V for low power types and ~3V (or more) for high power types. So I would get a low voltage source, of say, 2.5V with a few ohms in series, this should light the low power LEDS (V ~2V), and not the high power (V ~3V), but check the voltage drop. Look at the data sheets for the LED for the threshold voltage to check my figures.
Frank
 

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