'Update group status.'

def update(self):

    super().update()
    self._light_ids = self._luminary.lights()
    light = self._bridge.lights()[self._light_ids[0]]
    self._brightness = int((light.lum() * 2.55))
    self._rgb = light.rgb()
    o_temp = light.temp()
    if (o_temp == 0):
        self._temperature = None
    else:
        self._temperature = color_temperature_kelvin_to_mired(o_temp)
    self._state = light.on()
