'Turn the light on.'

def turn_on(self, **kwargs):

    if ((ATTR_BRIGHTNESS in kwargs) and self._lutron_device.is_dimmable):
        brightness = kwargs[ATTR_BRIGHTNESS]
    elif (self._prev_brightness == 0):
        brightness = (255 / 2)
    else:
        brightness = self._prev_brightness
    self._prev_brightness = brightness
    self._lutron_device.level = to_lutron_level(brightness)
