Abstract: An incandescent lamp is designed to operate at lower than the AC line voltage and includes a voltage conversion circuit for lowering the line voltage to the operating voltage of the lamp. The circuit includes an output transformer which is disposed in the screw base of the lamp, the remainder of the circuit, which is high-temperature-intolerant, being disposed outside the base and the envelope of the lamp. In a reflectorized embodiment of the lamp, the high-temperature-intolerant portion of the circuit is disposed adjacent to the mouth of the reflector envelope on the outer surface thereof and, in a non-reflectorized bulb embodiment, the high-temperature-intolerant portion is disposed between the envelope and a skirt which is connected to the base.

Abstract: A lamp has a globe with an open rear portion encircled by a mounting collar. A removable base structure includes a base member with a cylindrical wall telescopically receiving the mounting collar therein, with pins on the collar latching in J-shaped slots on the base. A ceramic socket is received in a cup-shaped socket holder having an annular flange fixed to the base member. The holder has an aperture through which a replaceable bulb capsule can be received so that its wire terminal leads can be plugged directly into the socket. A wave spring is retained on the holder flange for engagement with a flange on the mounting collar to bias the assembly in its latched condition, with the socket holder and the bulb capsule extending into the globe through the open end thereof.

Abstract: The lamp comprises a frustoconical outer envelope. A bulb mounting member includes a flange disposed against or adjacent to the rear portion of the outer envelope and a post which protrudes through an opening in such rear portion into the interior of the outer evelope. A lamp base is secured to the rear portion of the outer evelope. A bulb is secured to the inner end of the post.