'Fetch new state data for this light.'

def update(self):

    from pytradfri import RequestTimeout
    try:
        self._light.update()
    except RequestTimeout:
        _LOGGER.warning('Tradfri    update    request    timed    out')
    if (self._light_data.hex_color not in (None, '0')):
        self._rgb_color = color_util.rgb_hex_to_rgb_list(self._light_data.hex_color)
