Brightness Control+ integrades with Windows allowing you to manage the brightness level of your monitors, including external ones.
Why choose Brightness Control+?
It is the most lightweight application that exists on Microsoft Store of this purpose. Compared to the competition, where most apps use 200+MB, we only require 2mb.
How does it work?
Using DDC/CI and WMI technologies it is now possible to control the brightness of your monitors from within your computer.
Info:
Make sure you monitor support DDC/CI or WMI and that it is enabled .