def status(self):
        """Return the daylight status string."""
        if self._status == 100:
            return "nadir"
        elif self._status == 110:
            return "night_end"
        elif self._status == 120:
            return "nautical_dawn"
        elif self._status == 130:
            return "dawn"
        elif self._status == 140:
            return "sunrise_start"
        elif self._status == 150:
            return "sunrise_end"
        elif self._status == 160:
            return "golden_hour_1"
        elif self._status == 170:
            return "solar_noon"
        elif self._status == 180:
            return "golden_hour_2"
        elif self._status == 190:
            return "sunset_start"
        elif self._status == 200:
            return "sunset_end"
        elif self._status == 210:
            return "dusk"
        elif self._status == 220:
            return "nautical_dusk"
        elif self._status == 230:
            return "night_start"
        else:
            return "unknown"
Return the daylight status string.