Abstract: An LED light includes a body, a holder connected to the body, and a function extension unit detachably connected to the body. The holder includes a telescopic member stretched or contracted to adjust a length of the holder along an axial direction of the LED light. The present disclosure can solve technical problems that a conventional LED light can't be adapted to different installation environments. The function extension unit is configured to set different function modules to communicate with a power supply of the body according to needs of different customers so as to drive the body to change an output state of the power supply, thereby light emitting units of the body can work in different states. The present disclosure can further provide a smart driving system of an LED light to be customized to control a lighting mode of the body.