gummy
Screen brightness/temperature manager for Linux/X11.
TLDR
Set the screen temperature to 3000K
$ gummy --temperature [3000]
Set the screen backlight to 50%
$ gummy --backlight [50]
Set the screen pixel brightness to 45%
$ gummy --brightness [45]
Increase current screen pixel brightness by 10%
$ gummy --brightness [+10]
Decrease current screen pixel brightness by 10%
$ gummy --brightness [-10]
Set the temperature and pixel brightness for the second screen
$ gummy --screen [1] --temperature [3800] --brightness [65]