Zooz 4in1 100 lux

I have a Zooz 4 in 1 that is installed on my back porch. I have several plants there so I using it to monitor environmental metrics and trigger actions when certain conditions are met. One mystery is the light sensor. It doesn’t go beyond 100 lux. Based in research regarding lux, daylight levels & lumens I am assuming this is a percentage, but based on what? Does anyone have experience with this sensor? Can the metric in lighting be changed to something else? I’ve been researching the net with no good result and Zooz website doesn’t address this issue.


This is from the manual.