def set_brightness(self, brightness, effect=EFFECT_SUDDEN, transition_time=MIN_TRANSITION_TIME):
        """
            This method is used to change the brightness of a smart LED

            :param brightness: is the target brightness. The type is integer and ranges from 1 to 100. The
                               brightness is a percentage instead of a absolute value. 100 means maximum brightness
                               while 1 means the minimum brightness.
            :param effect: if the change is made suddenly or smoothly
            :param transition_time: in case the change is made smoothly, time in ms that change last

            :type brightness: int
            :type effect: str
            :type transition_time : int
        """
        # Check bulb state
        if self.is_off():
            raise Exception("set_brightness can't be used if the bulb is off. Turn it on first")
        # Input validation
        schema = Schema({'brightness': All(int, Range(min=1, max=100)),
                         'effect': Any(self.EFFECT_SUDDEN, self.EFFECT_SMOOTH),
                         'transition_time': All(int, Range(min=30))})
        schema({'brightness': brightness, 'effect': effect, 'transition_time': transition_time})
        # Send command
        params = [brightness, effect, transition_time]
        self.api_call.operate_on_bulb("set_bright", params)
        # Update property
        self.property[self.PROPERTY_NAME_BRIGHTNESS] = brightness
This method is used to change the brightness of a smart LED

            :param brightness: is the target brightness. The type is integer and ranges from 1 to 100. The
                               brightness is a percentage instead of a absolute value. 100 means maximum brightness
                               while 1 means the minimum brightness.
            :param effect: if the change is made suddenly or smoothly
            :param transition_time: in case the change is made smoothly, time in ms that change last

            :type brightness: int
            :type effect: str
            :type transition_time : int