A semiconductor device is capable of being applied with both a positive and a negative voltage to its control gate, and writing to its memory requires a low voltage. The flow control device has a piston for controlling flow within the connecting opening which is functionally connected to an electric motor adapted to make it slide within a cylinder along a sliding axis, and a monolithic tubular jacket that surrounds, determining its coaxiality, the rotor of the electric motor and the flow control piston, further providing the cylinder. Furthermore, a peak frequency f is detected which shows the largest sound volume in the frequency distribution obtained after the fast Fourier transform. With this configuration of the cooling structure, the street lamp is protected from failure and has greatly improved durability. The translation mechanism is configured to translate the stage and the line of continuous wave electromagnetic radiation relative to one another.