I am trying to setup illuminance automations with a Hue motion sensor, but I don't what the maximum and minimum levels are. Could someone please provide the highest and lowest illuminance numbers that the Hue motion sensor can report?
Why do you need the maximum and minimum values?
When I setup automations using illuminance, I will typically check the illuminance value when I feel the light should be on. Then I will adjust my rule if I feel that it turns on when it is too light or too dark. After a few adjustments, I am typically able to get it the way I need it.
The values have been all over the place. I see values vary between hundreds and thousands when no significant brightness changes have occured
It shouldn’t do that… Are the batteries fully charged? Have you tried resetting it?
If that doesn’t work, it might be worthwhile to contact Hue.
FWIW - I have one of these - my unit detects a '1' (never zero - not sure why) at night with no lights on in the office - and when I hold my Cell phone Flashlight 4" away shining directly on the sensor I get s 4895 reading.
In comparison, the Lux value from OpenWeatherMap reached a high of 6430 this summer - and drops to 5 at night.
I'll add that I have a zooz sensor I was going to toss in the garbage but ended up needing a humidity sensor for automating the bath fan. It was giving me a low reading of 16 and a high reading of 245 when I first bought it 3 yrs ago. Because it was so odd, I stopped using it. I actually thought Lux was different then illumance at one point because of it. Hope thats interesting info.
The Zooz sensor, assuming you mean the ZSE41, is a bit odd--it doesn't actually report lux, just percent (percent of what, who knows). The Hubitat driver does conversion to lux in an attempt to make it match the standard units for illuminance in Hubitat (lux is to illuminance as degrees Fahrenheit or celosía are to temperature). This causes oddities sometimes--I recall the conversion not being linear, among other things. Definitely not the best for real lux measurements, but maybe for an idea of whether illuminance has crossed some threshold that is useful to you if the sensor has enough resolution to pick it up.
Hue is much better, in my experience. Just more expensive too. 
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