Lux sensor Browan TBAM100 - Is it me or is the device?

Hi All,
I just purchased some Browan/Tabs Ambient Light Sensor TBAM100 and I am comparing the readings with a reference lux sensor which has no LoRaWAN connectivity.

I wonder what’s your experience? I see values are vastly off and I wonder is it an issue with me or something else? FIY, I have two of the above-mentioned sensors and they show similar readings.

I will appreciate your feedback