An end cap (104) for a tubular light source (102), the tubular light source (102) being configured to be arranged in a lighting fixture (106) comprising at least one socket (108), wherein the end cap (104) comprises a housing (202), two connector pins (112) at least partly arranged on an outside of the housing (202) and adapted to fit in the socket, and a switch assembly comprising a switch element (110) arranged in between the two connector pins (112) and at least partly protruding from an opening in the housing (202), wherein a first side of the switch element (110) is adapted to fit into a slot in a socket (108) and wherein the switch assembly is configured to form a conductive path between the socket (108) and the tubular light source (102) through an axial rotation of the switch element (110) in relation to the housing (202) as the tubular light source (102) is rotatably mounted in the fixture (106).