Patent ID: 8905600

Claim:
A Light-Emitting Diode (LED) lamp, comprising: an LED package; a diffuser mounted over the LED package that forming an anti-dust enclosure with the LED package; a heat sink directly attached to the LED package to form a conductive thermal path, wherein the heat sink comprises a body having a cavity, a plurality of fins radiating from the body, and a cover plate over the plurality of fins, wherein the plurality of fins and the cover plate form sides of a plurality of passive air flow ducts each having only a top opening and a bottom opening to an outside of the LED lamp, wherein the top opening and the bottom opening are aligned for each of the air flow ducts, and wherein the fins include holes configured to facilitate thermal communication between the air flow ducts; a power supply enclosure within the cavity of the heat sink; a power supply electrically coupled to the LED package and disposed inside the power supply enclosure; and a screw base attached to the power supply enclosure and electrically connected to the power supply for fixing the LED lamp to a lighting fixture; and wherein the body of the heat sink includes one or more openings so as to facilitate airflow from the power supply to one of the top and bottom openings.