A lighting fixture, comprising: a housing assembly, comprising: a housing, at least comprising a lower end face and a side wall extending vertically from the lower end face, to form a mounting space; the lower end face being provided with an avoidance hole perforating the lower end face in an axial direction and communicating with the mounting space; and a light-emitting cover, a reflector and a light source assembly, which are superposed in the mounting space in an order from bottom to top; the light-emitting cover being fixedly connected with the housing; and the light-emitting cover abutting against the lower end face and at least partially closing the avoidance hole; and a bottom case assembly, comprising a bottom case, the bottom case being located above the light source assembly, assembled with the housing, and fixedly connected with the housing to be compressed together tightly and collectively accommodate the reflector and the light source assembly as well as the light-emitting cover, a substrate; a plurality of light sources, provided on the substrate, characterized in that the plurality of light sources is electrically connected with a drive component; the light source assembly further comprises a sensing module, provided at the substrate, exposed through the reflector and the light-emitting cover, and electrically connected with the drive component; the sensing module, when triggered, triggering the drive component to supply power to the plurality of light sources; the sensing module comprising a light sensor, the light sensor being triggered when light brightness is sensed to be less than a predetermined threshold, so that the lighting fixture is lit when the light brightness is not high. a housing assembly, comprising: a housing, at least comprising a lower end face and a side wall extending vertically from the lower end face, to form a mounting space; the lower end face being provided with an avoidance hole perforating the lower end face in an axial direction and communicating with the mounting space; and a light-emitting cover, a reflector and a light source assembly, which are superposed in the mounting space in an order from bottom to top; the light-emitting cover being fixedly connected with the housing; and the light-emitting cover abutting against the lower end face and at least partially closing the avoidance hole; and a housing, at least comprising a lower end face and a side wall extending vertically from the lower end face, to form a mounting space; the lower end face being provided with an avoidance hole perforating the lower end face in an axial direction and communicating with the mounting space; and a light-emitting cover, a reflector and a light source assembly, which are superposed in the mounting space in an order from bottom to top; the light-emitting cover being fixedly connected with the housing; and the light-emitting cover abutting against the lower end face and at least partially closing the avoidance hole; and a bottom case assembly, comprising a bottom case, the bottom case being located above the light source assembly, assembled with the housing, and fixedly connected with the housing to be compressed together tightly and collectively accommodate the reflector and the light source assembly as well as the light-emitting cover, a substrate; a plurality of light sources, provided on the substrate, characterized in that the plurality of light sources is electrically connected with a drive component; the light source assembly further comprises a sensing module, provided at the substrate, exposed through the reflector and the light-emitting cover, and electrically connected with the drive component; the sensing module, when triggered, triggering the drive component to supply power to the plurality of light sources; the sensing module comprising a light sensor, the light sensor being triggered when light brightness is sensed to be less than a predetermined threshold, so that the lighting fixture is lit when the light brightness is not high.