US Patent 7888851 LED lamp

An LED lamp includes a base, at least first and second heat sinks, and at least first and second LED modules. The first heat sink includes a first heat absorbing surface and a first mounting surface which is mounted to the base, and defines axially a first through hole. The second heat sink includes a second heat absorbing surface and a second mounting surface which is mounted to the base. The second heat sink is received in the first through hole of the first heat sink. The second heat sink has a height greater than a height of the first heat sink whereby the second heat absorbing surface extends out of the first heat sink. The first and second LED modules are mounted on the first and second heat absorbing surfaces, respectively.