Satellite and installation of street lights

The street light is usually divided by the shape of the rays.
1 projection. A diffusion of the light emitted along the light emitted in the light is divided into short, medium, and three.
2 expand. Indicates that the light emitted by the luminaire is divided into a narrow, general, and wide.
3 control. Indicates the degree of the lamp control glare, divided into limited, medium and strict.
The installation of the street lamp has several brackets, high challenges, straight rods, suspensible and absorbing walls.