The surface-mounted downlight housing features a simple cylindrical design. It can be directly fixed on the ceiling without slotting. The material is sturdy and has good heat dissipation performance, which can adapt to different specifications of downlight sources and provide stable protection and support for the light sources. Its appearance is simple and elegant, and versatile colors such as white can easily integrate into various interior decoration styles. It is suitable for various spaces such as living rooms, corridors, and offices. While achieving the lighting function, it can also be used as a decorative element on the ceiling to enhance the overall aesthetics of the space.