A recessed lighting fixture includes a housing having one or more side walls, one or more of which including at least one elongate slot formation, the slot formation including a pair of oppositely extending lateral edge formations, each lateral edge formation having a first dimension, a retaining clip to be located in the slot formation for movement therealong. The retaining clip has a first portion to extend through the slot formation and to travel along an inner surface of the corresponding side wall on opposite sides of the slot formation, a second portion having a second dimension exceeding the first dimension and to travel along an outer surface of a corresponding side wall on opposite sides of the slot formation. The second portion is arranged to be biased outwardly from the housing relative to the first portion, the second portion joined to a third portion, the third portion being arranged to extend through the slot formation in a retained position, in which the third portion is retained against an inner surface of the corresponding lateral edge formation with the second portion in a spring-loaded orientation. The third portion is movable from the retained position to a released position when separated from the lateral edge formation, thereby causing the second portion to be transferred from its spring-loaded orientation to an outwardly extended orientation relative to the housing.