Low forward current LED and How to visualize mcd of a LED given in the datasheet?

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RMADHUSUDHAN

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Dear Sir / Madam,

Can you please suggest any low forward current LED which can give good mcd?

I am using this LED in a PCB as an indicator. How much mcd is good enough for an indicator LED?

How to visualize or quantify mcd of an LED?

Thank you very much in advance,

Regards,
Madhusudhan
 

You'd need to check the data sheet for the specific device. Rule of thumb, a Red LED works fine with 10mA,
and 20mA is bright for an indicator usually.
In terms of mcd, technically you can see even a fraction of that. Depends on how bright the environment is.
So, long story short, basically you need to try it out with a battery and resistor, and find a current value you're happy with
that doesn't exceed the specs.
 
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