A lighting device may include a light irradiation portion, a main control module, and a second connector. The light irradiation portion may generate and irradiates light. The light control portion may control power applied to the light irradiation portion. The main control module may include an antenna to communicate with an external device by a wireless communication and control the light control portion according to a control signal from the external device. The second connector may be provided in the main control module and may connect the main control module and the light control portion by a wired communication. The second connector may include a first printed circuit board having a mode pin (for determining a control mode of the light control portion) and a power pin (for supplying power from the light control portion to the main control module), and a second printed circuit board having a control pin (for supplying a control signal from the main control module to the light control portion).