Red Constant Bright Solar Reflective Pavement Markers With . Solar Reflective Road Stud Constant Bright For Parking Lot. Solar LED Road Studs are also known as solar raised pavement markers, solar reflective lane markers and solar warning devices. specification: Weight: 331g Waterproof Rating: IP68 Temperature Rating -35~80 Luminous Mode: constant type Dimensions: 10.8 .