Patent ID: 7748876

Claim:
An LED lamp comprising: a hollow prism-shaped first heat sink with a through hole defined from a bottom to a top thereof and a plurality of outer sidewalls; a plurality of LED modules being mounted on the outer sidewalls and around the through hole of the first heat sink respectively, each of the LED modules comprising a printed circuit board and a plurality of LEDs mounted thereon; a second heat sink being received in the through hole of the first heat sink and being enclosed by the first heat sink; and a plurality of heat pipes connecting the first heat sink to the second heat sink; wherein when the LEDs are activated, heat generated by the LED modules is conducted to the first heat sink firstly, and then is transferred to the second heat sink by the heat pipes; and wherein the first heat sink has an inner face enclosing the through hole thereof, and a plurality of grooves is defined at the inner face of the first heat sink and communicates with the through hole of the first heat sink.