[problem] even at night, to provide a warning light of the electric fence that can be warning against human beings closer to the bare wire. A warning light An electric fence, warning lights 2, a metal hook portion 27 is hooked to the bare wire, an illumination unit 21, a power supply unit connected to the illumination unit 21 , comprising a, a switch control circuit unit 26 connected between the illumination unit 21 and the power unit, the switch control circuit 26, when a high voltage is sent through the hook portion 27 from the bare wire, illuminating section 21 and a power source the connection between the parts is turned on to supply current from the power supply unit to the lighting unit 21, when a high voltage is not sent through the hook portion from the bare wire, turn off the connection between the illuminating unit 21 and the power supply unit, the current from the power supply unit does not supply to the illumination unit 21.FIELD 3【課題】夜間でも、裸電線に近づく人間に対して警告できる電気柵の警告灯を提供する。【解決手段】電気柵の警告灯であって、警告灯2は、裸電線に引っ掛けられる金属製のフック部27と、照明部21と、照明部21に接続された電源部と、照明部21と電源部との間に接続されたスイッチ制御回路部26と、を備え、スイッチ制御回路部26は、裸電線からフック部27を通じて高電圧が送られるとき、照明部21と電源部との接続をオンにして、電源部からの電流を照明部21に供給し、裸電線からフック部を通じて高電圧が送られないとき、照明部21と電源部との接続をオフにして、電源部からの電流を照明部21に供給しない。【選択図】図3
