bool: The speaker's night mode.

        True if on, False if off, None if not supported.

def night_mode(self):
        """bool: The speaker's night mode.

        True if on, False if off, None if not supported.
        """
        if not self.is_soundbar:
            return None

        response = self.renderingControl.GetEQ([
            ('InstanceID', 0),
            ('EQType', 'NightMode')
        ])
        return bool(int(response['CurrentValue']))