'Turn on (or adjust property of) a group.'

@state(True)
def turn_on(self, transition_time, pipeline, **kwargs):

    if (ATTR_BRIGHTNESS in kwargs):
        self._brightness = kwargs[ATTR_BRIGHTNESS]
    if (ATTR_COLOR_TEMP in kwargs):
        self._temperature = kwargs[ATTR_COLOR_TEMP]
    pipeline.transition(transition_time, brightness=_from_hass_brightness(self._brightness), temperature=_from_hass_temperature(self._temperature))
