Please tell us some basic information before asking for help:
Model Name: ZS620KL
Firmware Version: 18.104.22.168
Rooted or not: No
Frequency of Occurrence:
APP Name & APP Version (If your issue relates to the app):
In addition to information above, please also provide as much details as you can, e.g., using scenario, what troubleshooting you've already done, screenshot, etc.
I used an external device with a third-party app to measure max brightness. It was around 350 lux. Is there any way to get the value in nits? Ideally, it should be 550 nits.