Patent ID: 7637636

Claim:
An LED lamp comprising: a lamp base defining a plurality of vents therein; a first heat sink mounted on the lamp base and comprising a cylinder at a centre thereof, the cylinder having a through hole defined therein, which communicates with the vents of the lamp base and cooperates with the vents to form an air passage communicating with ambient air; a plurality of second heat sinks attached to a periphery of the first heat sink, a thickness of each of the second heat sinks varying along a length direction of the each of the second heat sinks; and a plurality of LED modules attached to the second heat sinks, respectively; wherein the each of the second heat sinks comprises a body portion attached to the first heat sink, an outer wall extending slantwise from an end portion of the body portion for a corresponding LED module mounting thereon, a plurality of connecting ribs connecting the body portion with the outer wall, and a plurality of channels with different sizes each defined between every two adjacent connecting ribs for allowing air to flow therethrough.