Abstract: A shell form ballast has rounded corners for positioning inside a ballast housing for use with a fluorescent light bulb adapter. The ballast has rounded outer corners to meet both long-term life and power requirements, and spatial design constraints of a fluorescent lamp adapter assembly for use in an incandescent lighting fixture, and particularly for use in a recessed incandescent lighting fixture. The rounded outer corners of the ballast provide the ability for the shell form ballast to fit into a hollow housing for use in the recessed lighting fixture while simultaneously providing the shell form ballast a snug fit in the hollow housing, thereby minimizing gap growth.

Abstract: A mechanism for locking a fluorescent lamp adaptor to a standard incandescent screw-in lamp socket utilizing base member having a bottom and wall portions. The wall portion of the base member possesses an inner surface and an outer surface and an aperture extends through the wall portion. A male screw-in element is also utilized and is confined to the base member for freely rotating relative to the base member and the screw-in lamp socket. A tool urges the threaded male screw-in element into threading engagement with the standard screw-in lamp socket to permit insertion and removal of the lamp adaptor in relation to the standard screw-in lamp socket.