The invention provides a power supply component capable of making the heat generated by a resistor controlled by the current difficult to transfer to a LED chip of a semiconductor lighting element and preventing the LED chip from easily deteriorating. The power supply component comprises a semiconductor lighting element, comprising an anode connection terminal connected with an anode side of a power supply, a ground terminal connected with a ground potential and a LED chip, wherein the LED chip is loaded on one of the terminal of the anode connection terminal or the ground terminal; a bus line electrically connecting the anode connection terminal with the anode side of the power supply and the ground terminal with the ground potential; and a current control resistor in serial connection with the bus line and arranged at one side of another terminal of the semiconductor lighting element which does not loaded with the LED chip.