a clip mountable to a lighting fixture or the like adjacent a bar hanger assembly for pivotal movement between positions which are either disengaged from the bar hanger assembly or engaged with the bar hanger assembly in one or more positions , disengagement of the clip allowing elements of the bar hanger assembly to be displaced relative to each other to fit the fixture properly in an installation between joists of a ceiling or a gridwork of a suspended ceiling . engagement of the clip with portions of the bar hanger assembly of two differing sizes allows positive latching of the bar hanger assembly to the fixture regardless of the degree of extension between the elements of the bar hanger assembly . the clip is easily moved between latched and unlatched positions by means of thumb pressure .