A lighting device is disclosed herein. The lighting device may include an LED module having a plurality of LEDs and a heat sink that dissipates heat generated by the LEDs. The heat sink may be electrically insulated from the LEDs and other electrical components to improve the inner voltage property of the lighting device. In the lighting device as disclosed herein, a number of connectors required to assemble the various components of the lighting device may be reduced, and efficiency during assembly may be improved accordingly.