light

controls the backlight brightness of laptop screens and other controllable

TLDR

Get current backlight value

$ light

Set backlight to 50%

$ light -S 50

Increase backlight by 20%

$ light -A 20

Decrease backlight by 20%

$ light -U 20

SYNOPSIS

light [options]

DESCRIPTION

light controls the backlight brightness of laptop screens and other controllable backlights. It works without X or Wayland and can save and restore brightness levels.

PARAMETERS

-S PERCENT

Set brightness to specified percent

-A PERCENT

Add percent to current brightness

-U PERCENT

Subtract percent from current brightness

-G

Get current brightness (default)

-O

Save current brightness

-I

Restore previously saved brightness

-L

List available devices

-s DEVICE

Select specific device

CAVEATS

May require udev rules for non-root access. Works with devices exposed through /sys/class/backlight.