US Patent 7275841 Utility lamp

A utility lamp (1) comprises a curved reflector (2) having a spherically curved surface. An array of LEDs (3) is arranged in an electrical circuit on a thin substrate mounted via thermally conductive epoxy on a thermally-conductive base (4), which in turn forms an integral part of the reflector (2). The LEDs are mounted for efficient heat transfer by conduction to the reflector (2). The reflector (2) thus operates as both a light reflector and as a radiative heat sink. The heat radiating properties of the reflector are enhanced by integral fins (7) extending in the radial direction around the periphery of the reflector (2). The reflector (2) is of integral aluminium construction.