LED output help

[Bob Brogan]

I've looked at LED's and they're all rated in mcd. I need to find what
the power is in mw, not mcd.

How do I convert or measure that quantity? At the surface of the LED.

What mcd diode do I need to get 6mw of power @660nm?

TIA!

 

[Lord Garth]

I've looked at LED's and they're all rated in mcd. I need to find what
the power is in mw, not mcd.

How do I convert or measure that quantity? At the surface of the LED.

What mcd diode do I need to get 6mw of power @660nm?

TIA!

This should help http://www.electro-optical.com/whitepapers/candela.htm