A control box arrangement including at least one control box which is sub-divided, or can be sub-divided, by vertical wall sections with a horizontal sub-division, into a plurality of cuboid compartments surrounded on all sides. When this plunger is used to injection molding of a BMG, it allows reduction of formation of crystalline phases near the plunger tip and allows replacement of the plunger tip without replacement of the plunger body. Therefore, side effects caused by the addition of a light stabilizer, such as precipitate generation, may be prevented. The second elastomer discontinuous phase domains are in sufficient number and of sufficient size, and there is a sufficient amount of the thermally conductive filler, so that the thermally conductive filler is concentrated sufficiently to be nonuniformly distributed through the fusing surface layer as a network. The lighting unit includes an outer pair of light emitting sets and at least one other light emitting set disposed between the outer pair of the light emitting sets.