code: def set_brightness(self, percent, group=None):
          
          # If input is float, assume it is percent value from 0 to 1.
          if isinstance(percent, float):
              if percent > 1:
                  percent = int(percent)
              else:
                  percent = int(percent * 100)
          percent, value = self.get_brightness_level(percent)
          self.on(group)
          self._send_command((b"\x4e", struct.pack("B", value)))
          return percent
docs: Set brightness.
  
              Percent is int between 0 (minimum brightness) and 100 (maximum brightness), or
              float between 0.0 (minimum brightness) and 1.0 (maximum brightness).
  
              See also .nightmode().
  
              If group (1-4) is not specified, brightness of all four groups will be adjusted.