An LED light bulb in the shape of an incandescent light bulb having an engagement end that is insertable into a light fixture socket; a diffuser provided at a second opposed end of the LED light bulb and a heat sink that extends from the engagement end to the diffuser. The heat sink comprises a plurality of fins extending in the axial direction, the fins forming an exterior surface of the LED lightbulb, the heat sink having an axial inner end located at the engagement end and an axial outer end located at an axial inner end of the diffuser.