diff --git a/etc/udev/rules.d/90-backlight.rules b/etc/udev/rules.d/90-backlight.rules
new file mode 100644
index 0000000..b9306f7
--- /dev/null
+++ b/etc/udev/rules.d/90-backlight.rules
@@ -0,0 +1,7 @@
+# screen backlight
+ACTION=="add", SUBSYSTEM=="backlight", RUN+="/bin/chgrp video /sys/class/backlight/%k/brightness"
+ACTION=="add", SUBSYSTEM=="backlight", RUN+="/bin/chmod g+w /sys/class/backlight/%k/brightness"
+# keyboard backlight
+ACTION=="add", SUBSYSTEM=="leds", RUN+="/bin/chgrp video /sys/devices/platform/thinkpad_acpi/leds/tpacpi::kbd_backlight/brightness"
+ACTION=="add", SUBSYSTEM=="leds", RUN+="/bin/chmod g+w /sys/devices/platform/thinkpad_acpi/leds/tpacpi::kbd_backlight/brightness"
+