code: def set_white(self, brightness, colourtemp):
          
          if not 25 <= brightness <= 255:
              raise ValueError("The brightness needs to be between 25 and 255.")
          if not 0 <= colourtemp <= 255:
              raise ValueError("The colour temperature needs to be between 0 and 255.")
  
          payload = self.generate_payload(SET, {
              self.DPS_INDEX_MODE: self.DPS_MODE_WHITE,
              self.DPS_INDEX_BRIGHTNESS: brightness,
              self.DPS_INDEX_COLOURTEMP: colourtemp})
  
          data = self._send_receive(payload)
          return data
docs: Set white coloured theme of an rgb bulb.
  
          Args:
              brightness(int): Value for the brightness (25-255).
              colourtemp(int): Value for the colour temperature (0-255).