Integral embodiment of reflector and heat sink

A lamp assembly (200, 200-1, 200-2, 200-3, 200-4, 200-5), comprising: having an integral embodiment of reflector and heat sink that a reflector portion (110, 310) comprises an integrated heat sink and a plurality of integral cooling fins (130, 130-1, 810, 820) which are connected to the integrated heat sink; a cathode assembly (205, 205-1, 205-2, 205-3, 205-4) connected to the reflector section (110, 310) is mechanically coupled; an anode (210) connected to the reflector section (110, 310) is mechanically coupled to and from the cathode assembly (205, 205-1, 205-2, 205-3, 205-4) is electrically isolated; and at least one thermal stress reduction characteristic.