The TRIPLTEK 8 sustains 1200 nits and the 9 1300 nits Brightness all the time, this is called Sustained Brightness.
The Smartphones brands announce their Peak brightness numbers, which can only be sustained for seconds before the device returns to its typical brightness, often 3 or 4 times less than the advertised peak brightness.
On the opposite end, the TRIPLTEK Models have been designed to maintain their display brightness at 1200 nits or 1300 nits Sustained during hours of continuous operation.
Check this youtube channel you can see a brightness comparison with other phones like iPhone 12 and Samsung Note20:
https://www.youtube.com/c/Industrialdevices
