Fronnor Solar Road Stud Paving Road Non-Flash Self-Luminous IP68 Waterproof Solar Reflective Lane Markers Blue Color (Pack of 2) High shock resistance,Automatically starts to work when night falls or with the onset of inclement weather energy saving. No UV rays ,environment friendly The LED light come on automatically as soon as it starts getting dark every night. It is cost effective, easy to install and require absolutely no wires or maintenance. Dramatically enhance the look of your garden and yard. They have been specifically designed with road safety in mind and can help to prevent serious accidents and emit rather than reflect light. Application Area :Walkway ,Pathway ,Street , Highway,decks, docks, boats, stairways, pavements.