diff --git a/files/settings/i3.config b/files/settings/i3.config
index 4be95a9..5e1cdbb 100644
--- a/files/settings/i3.config
+++ b/files/settings/i3.config
@@ -174,7 +174,8 @@ bindsym $shift+XF86AudioLowerVolume exec --no-startup-id bash -c 'source /usr/lo
 ## Keyboard Brightness ##
 
 # Macbooks tend to use 'sysfs/leds/smc::kbd_backlight'
-# NovaCustom laptop is '' (TBD, use light -L, may be 'sysfs/class/leds/...')
+# NovaCustom laptop is 'sysfs/leds/system76_acpi::kbd_backlight'
+# Some other laptops may be 'sysfs/class/leds/...', use ìght -L`to find out.
 bindsym XF86KbdBrightnessUp          exec "light -s sysfs/leds/smc::kbd_backlight -A 05 && notify-send 'Keyboard Brightness +  ' $(light -s sysfs/leds/smc::kbd_backlight -G)"
 bindsym XF86KbdBrightnessDown        exec "light -s sysfs/leds/smc::kbd_backlight -U 05 && notify-send 'Keyboard Brightness -  ' $(light -s sysfs/leds/smc::kbd_backlight -G)"
 bindsym $shift+XF86KbdBrightnessUp   exec "light -s sysfs/leds/smc::kbd_backlight -A 20 && notify-send 'Keyboard Brightness +++' $(light -s sysfs/leds/smc::kbd_backlight -G)"