diff --git a/nixos/modules/programs/light.nix b/nixos/modules/programs/light.nix
index 93bfda481fe..9f2a03e7e76 100644
--- a/nixos/modules/programs/light.nix
+++ b/nixos/modules/programs/light.nix
@@ -13,7 +13,8 @@ in
         default = false;
         type = types.bool;
         description = ''
-          Whether to install Light backlight control command and udev rules.
+          Whether to install Light backlight control command
+          and udev rules granting access to members of the "video" group.
         '';
       };
     };