traffic led solar road stud: 1,Material: solar panel,PC,LED,reflector 2.Working time: Up to 7 days after ... range is road studs, road signs, and traffic signs.traffic led solar road stud Features:1.Compressive strength index:30tons;Water proof ... >24hours,continuous working time in frequency flashing condition > 108h 6.ABS and high optical opacity polycarbonate ; Resistant to corrosion: Water proof ...