1w & 3w High flux LEDs differentiation

[manishanand14]

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?

 

[chuckey]

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