A circuit board includes a plurality of conductive layers, at least one group of vias, a number of second vias, at least one power supply element, and at least one electronic element. In the illumination variable calorimetric method and colorimeter, an illumination adjustment mechanism and an illumination measurement light receiver are disposed in a measurement optical path of an optical portion. The system includes a control unit and sensors for executing the method. The heat sink is disposed in the lampshade and includes a heat-dissipating shell and a heat-dissipating frustum. The polymer alloy of this invention can provide a molded article, film, fibers and the like respectively with excellent mechanical properties at high productivity.