A lighting assembly (100) configured to be mechanically and electrically connected to a socket (150), the lighting assembly comprising a lighting module (102) comprising a light source (106), electrical contacting means (108) electrically connected to the light source and a heat spreader (110) in thermal contact with the light source; and a connector (104) being rotatable in relation to the lighting module (102). The connector comprises connector locking means (119) for locking the lighting assembly to a socket through interaction with receiving locking means comprised in the socket when the lighting module is axially inserted into the socket and the connector is rotated relative to the lighting module and the socket, thereby bringing the electrical contacting means (108) into contact with corresponding receiving contacting means (122) comprised in the socket. Hereby, the space required for electrical contacting means in the lighting assembly and in the socket may be reduced as no space is reserved in the socket for rotation of the electrical connecting means.