Patent ID: 7663229

Claim:
A lighting device comprising a plurality of light emitting sources mounted on a thermally conductive housing and electrically connected to a circuit board, wherein said housing comprises a base portion which is spaced apart from said circuit board, and an intermediate heat dissipation structure in thermal communication with said plurality of light emitting sources, the intermediate heat dissipation structure being disposed intermediate said circuit board and said base portion of said housing, for promoting cooling by convection, said intermediate heat dissipation structure comprising a plurality of protrusions thermally connecting said plurality of light emitting sources with said housing, said plurality of protrusions being spaced apart, with respect to each other, and wherein the spacing between adjacent protrusions is arranged so as to allow heat dissipation from said protrusions uron movement of air across said housing; each said light emitting source being mounted on a forward end or a free end of said protrusion so that heat generated by a light emitting source is transferable to said base portion via said protrusion for heat dissipation, and, to allow forward emission of light away from said base portion along a primary optical axis, wherein each said protrusion extends forwardly from the main housing towards the circuit board along the primary optical axis of the light emitting source mounted thereon.