4   services.acpid = {
  3     enable = true;
  2     handlers = {
  1       brightnessUp = {
42          action = "light -A 5";
  1         event = "video/brightnessup";
  2       };
  3       brightnessDown = {
  4         action = "light -U 5";
  5         event = "video/brightnessdown";
  6       };
  7   };