1. the main body of lamps is aluminum tube and its conjunction pieces are aluminum casts, with their exterior surface.plastic-sprayed.it has high tenacity and is endurable. 2.the penetrating cover is made of PMMA of high transparency. it is resistible to ultraviolet radiation, static.Besides, it never truns yellow. 3.reflector gets molded by mirror aluminum, and is awarded"the best design of light matching" 4.the protection level of the lamp is IP65 while the shock protecting measures falls into 2 category. 5.the lamp adopts subsection-independent structure, which can be fit together accofding to the end. 6.various and optional illumination angles lead in the great adjustment to the complicated illumination meeds. 7.efficient and concentrating illumination avoids light pollution caused by floodlight.