Abstract: Disclosed herein is a light-emitting diode (LED) light using a relay capable of dimming. The LED light includes: a first relay unit configured to be supplied with first power from the outside, and to comprise a first relay and a second relay; first and second resistors configured to be supplied with second power or a control signal from the outside, and to drive the first or second relay; a second relay unit configured to cut off the first power when the second power is supplied in a state in which the first power has been supplied to the first relay unit, and to be supplied with the first power when the control signal is received in the state in which the first power has been supplied to the first relay unit; a first SMPS configured to convert AC current; and a second SMPS configured to convert AC current.