xfpm-power-backlight-helper(1) control the brightness from the command line

DESCRIPTION

Usage:

xfpm-power-backlight-helper [OPTION...]

XFCE Power Manager Backlight Helper

Help Options:

-h, --help
Show help options

Application Options:

--set-brightness
Set the current brightness
--get-brightness
Get the current brightness
--get-max-brightness
Get the number of brightness levels supported