a light fitting , particularly a built - in light fitting for ceilings and / or walls , includes an embeddable housing for receiving lighting means , a reflector , a housing frame , a functional frame , which can be detached at least partially from the housing frame and a locking device , which acts between the housing frame and functional frame . the locking device includes at least one wire spring , the wire spring being provided with a spring section extending between two locking elements formed in end areas of the wire spring . the locking elements cooperate with a respective locking receiving element in the functional frame . a wire limb is respectively formed between the spring section and locking elements . when the wire limb is pivoted and the spring section is deformed as a result , it is possible to modify the relative position of the locking elements relative to each other .