traffic led solar road stud: 1,Material: solar panel,PC,LED,reflector 2.Working time: Up to 7 days after battery ... range is road studs, road signs, and traffic signs.traffic led solar road stud Features:1.Compressive strength index:30tons;Water proof ... range from -25°Cto +75°C5.Light source :High intensity LED ,LED quantity :4pcs .Color :Red, yellow ,blue, green and white .Lighting ...