Patent ID: 8227964

Claim:
A lighting device comprising: a light emitting module including a substrate and a light emitting diode disposed on the substrate; a member disposed on the light emitting module, the member including: a base having a hole configured to receive the light emitting diode; and a projection configured to reflect light from the light emitting diode, a diameter of the base being greater than a maximum diameter of the projection; a cover surrounding the light emitting module and the member; and a heat sink including: an upper portion having a flat surface on which the substrate is disposed; and a lower portion having a plurality of grooves formed on a side surface of the lower portion of the heat sink, the upper portion of the heat sink having a first diameter of a portion adjacent to the flat surface and a second diameter of a portion adjacent to the lower portion, and the first diameter being less than the second diameter, and the lower portion of the heat sink having a third diameter of a portion adjacent to the upper portion and a fourth diameter of a portion away from the upper portion, and the third diameter being greater than the fourth diameter.