Patent ID: 8322897

Claim:
A lighting fixture comprising: a light source assembly configured to house a light source; a heat sink having a central housing and a plurality of fins extending from the central housing, the central housing having a first end having a first perimeter and a second end having a second perimeter, wherein the first perimeter has a first closed circuit shape, and wherein the second perimeter has a second closed circuit shape; a driver housing comprising a bottom end, wherein the bottom end has substantially the first closed circuit shape; a thermally conductive sealing gasket positioned between the second perimeter of the second end of the heat sink and the light source assembly, wherein the thermally conductive sealing gasket has a shape substantially corresponding to second closed circuit shape, wherein the thermally conductive sealing gasket has a thermal conductivity of at least about 6 Watts per meter-Kelvin, wherein the thermally conductive sealing gasket provides an environmental seal between the heat sink and the light source assembly; and a thermally nonconductive sealing gasket or a thermally semi-conductive sealing gasket positioned between the first end of the heat sink and the bottom end of the driver housing and providing an environment seal between the heat sink and the driver housing.