1. A luminaire comprising a swivel assembly and a lamp support for connection to the swivel assembly,the swivel assembly comprising a swivel member having an interlock element,
the lamp support comprising:
a locking arrangement comprising a deformable portion mounted on a surface of the lamp support, the locking arrangement being adapted to engage with the interlock element of the swivel assembly,
wherein the deformable portion is adapted to be movable relative to the surface of the lamp support so as to move from a first position, in which the swivel assembly is connectable to the locking arrangement so as to permit connection of the swivel member from the lamp support, to a second position, in which the locking arrangement cooperates with the interlock element to prevent removal of the swivel member from the lamp support,
wherein when the swivel assembly and the lamp support are connected, the deformable portion resiliently grips the swivel member,
wherein the lamp support further comprises an aperture adapted to at least partially permit passage of the swivel member therethrough, and
wherein unidirectional passage of the swivel member through the aperture causes the deformable portion to move from the first position to the second position.