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