Abstract: A lighting system using a PL fluorescent lamp which is capable of screwing into a standard electrical lamp socket utilizing a base member possessing a mechanism for mechanically supporting a PL fluorescent lamp. A male fitting is connected to the base member and includes an outer surface which may be threaded in configuration. An adaptor is also used in the present system and is capable of mechanically and electrically connecting to a standard Edison electrical lamp socket. The adaptor includes an external threaded outer surface for threadingly engaging the standard Edison lamp socket, and also includes an inner surface in the form of a lamp socket. The inner surface lamp socket of the adaptor is capable of mechanically and electrically contacting the outer surface of the male fitting. The adaptor inner lamp socket and male fitting are of a non-standard size. The adaptor locks into the standard Edison electrical lamp socket, preventing its usage by standard incandescent lamp bases.

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.