A lighting apparatus is disclosed. The lighting apparatus may include a heat sink, an LED module provided on the heat sink, an enclosure provided over the heat sink to surround the LED module, an insulator provided between the heat sink and the enclosure, a power module provided below the heat sink to provide power to the LED module, a housing attached to the heat sink to house the power module, and a power socket mounted to the housing and electrically connected to the electronic module. The heat sink may include a channel formed to correspond to a shape of the enclosure and the insulator may be provided in the channel, the insulator and the enclosure being formed of different materials.