5 Star Service
Why does my Light Sensor show a really low reading even when the lights are on?
The readings from most Z-Wave Light Sensors depend on what the internal sensor is capable of providing.
Of the above sensors, only the Aeon Multisensor 6 and the Fibaro Motion Sensor actually provide a true "Lux" reading, but even then those readings may not be what you were expecting.
When you look at the true definition of "Lux" you can see that the readings can vary by large amounts:
Our advice is to take some basic readings from the sensor in its' final location so that you get a true "real-world" indication – night with lights off, night with lights on and daylight.
Use these readings as a starting point and then build your logic around them!