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Old Apr 20th 2017, 05:48 AM   #1
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convert from lux to candela

hello
i'm working on a project that consist on reading the light of LEDs on PCB to determine the color code (R,G,B) and light intensity
but the sensor gives me values in LUX which is the illuminance and i need to convert them to Candela
I found this formula in wikipedia but i didn't understand how to apply it:
1lx=1Lm/mē=(1cd x sr )/mē
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Old Apr 21st 2017, 04:54 PM   #2
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I have just spent a few minutes perusing Wikipedia and think I have it...
Candela seem to be in polar coordinates, with lux in Cartesian coordinates.

A light source of 1 candela intensity gives a luminous flux of 1 lumen per steradian.
A light source of 1 lux intensity gives a luminous flux of 1 lumen per square metre.
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