Convert percents to bulbs internal range.

            percent should be integer from 0 to 100.
            Return value is 2 (minimum brightness) - 27 (maximum brightness)

def get_brightness_level(cls, percent):
        """ Convert percents to bulbs internal range.

            percent should be integer from 0 to 100.
            Return value is 2 (minimum brightness) - 27 (maximum brightness)
        """
        # Clamp to appropriate range.
        percent = min(100, max(0, percent))

        # Map 0-100 to 2-27
        value = int(2 + ((float(percent) / 100) * 25))
        return percent, value