'Turn the specified light on.'

def turn_on(self, **kwargs):

    self._state = True
    rgb = kwargs.get(ATTR_RGB_COLOR)
    brightness = kwargs.get(ATTR_BRIGHTNESS)
    if (rgb is not None):
        self._rgb = rgb
    if (brightness is not None):
        self._brightness = brightness
    self.set_state(self._rgb[0], self._rgb[1], self._rgb[2], self.brightness)
    self.schedule_update_ha_state()
