'Turn the light on.'

def turn_on(self, **kwargs):

    if (ATTR_COLOR_TEMP in kwargs):
        self.smartbulb.color_temp = mired_to_kelvin(kwargs[ATTR_COLOR_TEMP])
    if (ATTR_KELVIN in kwargs):
        self.smartbulb.color_temp = kwargs[ATTR_KELVIN]
    if (ATTR_BRIGHTNESS in kwargs):
        brightness = kwargs.get(ATTR_BRIGHTNESS, (self.brightness or 255))
        self.smartbulb.brightness = brightness_to_percentage(brightness)
    self.smartbulb.state = self.smartbulb.BULB_STATE_ON
