Aqara Light Sensor T1 reporting interval

Hi
I have 3 Aqara Light Sensors T1 and I am using Z2M for configuration. All looks good, but something is not making sense with reporting interval. I set it for 5 sec for 2 sensors and 2 sec (just for experiment) for 3d sensor. However, it looks like these sensors report illuminance (in lux) values with some kind of increments of illuminations changes (percentage of previously reported value I would guess), which I do not see where it can be configured.
For comparison, I put Aeotec Multisensor (Z-wave) next to Aqara Light Sensor T1 sensor. Aeotec sensor has reporting interval 30 sec.


Any help will be appreciated

Vladi