A hydrocarbon application cable of reduced nylon with increased flexibility and useful life. The switched voltage is derived from an intermediate circuit voltage having a fixed pulse width and frequency so that the zero crossings of the resonant current generated in the resonant current are defined. The arm is rotatable relative to the joint and includes a pivot portion and a pivot hole defined in the pivot portion. That is, no air reservoir is formed between an electron incidence part 15a at the center of the semiconductor device 15 and the surface C of the stem 11, whereby air expanding at high temperature does not damage the electron incidence part 15a of the back-illuminated semiconductor device 15. The composition can take the form of a gel, a cream, a lotion, an ointment, a solution, a solid \u201cstick,\u201d etc.