Hue sensor: difference between light_level and illuminance

I have a HUE motion sensor. There’s a channel with light_level and a channel with illumunance.

Can anybody explain the difference between these two value’s?
I graph them in Grafana and there seems to be some correlation

Hi @Marijn_Oudijk,

AFAIK the light level is an Hue internal value to represent the illumination measured by the sensor. It is used to determine the dark and daylight values by comparison against the related thresholds (see configuration).