I am looking for zigbee light sensors

I've got two of these - they paired easily but I've yet to get an actual luminance (illuminance?) level report.
I've tried the Markus drivers and these https://github.com/waytotheweb
In both cases (both sensors, both drivers), they show as present, but no light level reading.

I've tried the double-clicking multiple times, placed them a couple feet from the hub, waited a long time, etc.

C5 Hub.

Any thoughts? Again - no issue pairing but just not getting light level reported.