I really like Arch-deriratives such as Antergos, but I am missing the feature which automatically adjusts the screen brightness... There are programs which adjusts the brightness based on input from the webcam but that didn't really ever work for me... So I wrote my own program which uses the computer's ambiance-sensors.
Everything is written in bash... and it is my first bash-script so it might not be super-pretty, but it works :-D
::: Installation :::
There are two ways:
The manual way
(pick _gmux or _intel accordinlgy)
1) Copy ambientLightFix to /usr/bin/
2) Copy ambientLightFix.service to /etc/systemd/system/
systemctl enable ambientLightFix_intel.service --now
The automated way
(will also help you uninstall or update to a newer version as well as check if you have ambience sensors before attempting setup)
AmbientLightFix_RunME.shin a Terminal and state your password a couple of times when prompted.
Hope my little program will give you many happy hours in front of your screen :-)