LED lamp

An LED (light emitting diode) lamp comprising:

• a lamp head having a circular cross-section;
• a lamp neck with a shell having a circular cross-section along a central axis thereof, the lamp neck comprising a first opening end connected to the lamp head, a second opening end opposite the first opening end, and a plurality of venting holes formed in the shell at the first opening end;
• a sleeve having a circular cross-section and being coaxial with the lamp neck, the sleeve comprising a third opening end connected to the second opening end of the lamp neck and a fourth opening end opposite the third opening end, wherein the sleeve extends from the third opening end to the fourth opening end, and the lamp neck and the sleeve form a chamber inside the lamp neck and the sleeve;
• a heat sink comprising a plurality of fins arranged radially and sleeving over the sleeve, the heat sink comprising a fifth opening end connected to the second opening end of the lamp neck and a sixth opening end opposite the fifth opening end;
• a power source disposed in the chamber formed by the lamp neck and the sleeve, the power source comprising a power board and a plurality of electronic components mounted thereon;
• a light board disposed at the sixth opening end of the heat sink and in physical and thermal connection with the heat sink, the light board comprising an opening at a center portion, the opening being coaxial with the lamp neck and exposing the sleeve and a portion of the plurality of fins;
• a plurality of LED chips mounted on the light board and electrically connecting to the power source;
• and
• a lamp cover disposed at the sixth opening end of the heat sink and covering the plurality of LED chips,
• wherein the chamber, the plurality of venting holes and the opening of the light board define a first heat dissipating channel, the plurality of fins and the opening of the light board define a second heat dissipating channel, wherein the first heat dissipating channel and the second heat dissipating channel share the opening of the light board, and the power source is disposed in the first heat dissipating channel.