Patent ID: 7275841

Claim:
A utility lamp comprising: a group of at least one light emitting diode; a reflector comprising; a base, a wall having an internal light-reflecting surface, and thermal dissipation fins the diode group being mounted on a thermally-conductive circuit board which is secured to the reflector base: some emitted light reflects from the internal surface of the reflector wall, and heat from the diode group is conducted into the reflector, and the reflector radiates this heat from its exposed surfaces; wherein the reflector is of greater cross-sectional area at the base than at the wall; wherein the fins extend from an external surface of the reflector wall, opposed to the internal light-reflecting surface; wherein the circuit board comprises a metal layer; and wherein each diode is of the surface mount type, the anode and cathode of which are soldered to metal tracks which have a thermal path to the reflector.