diff --git a/base/users.nix b/base/users.nix
index 26a4219..263163f 100644
--- a/base/users.nix
+++ b/base/users.nix
@@ -13,6 +13,7 @@ in
     extraGroups = [
       "media"
       "networkmanager"
+      "video" # for `light` permissions
       "docker"
       "wheel" # Enable ‘sudo’ for the user.
     ];
diff --git a/hosts/zephyrus/default.nix b/hosts/zephyrus/default.nix
index 1f55c38..83f7a0c 100644
--- a/hosts/zephyrus/default.nix
+++ b/hosts/zephyrus/default.nix
@@ -60,4 +60,6 @@ in
     enable = true;
     powerOnBoot = false;
   };
+
+  programs.light.enable = true;
 }