Lighting, powered by the Sun. Only outlay is the original cost, after that it's free electricity. No wiring required that gives you the freedom to place the lights. This light has no switch, just pull out the insulator sheet then put into use. On sunny days only takes about 4-5 hours to fully charge,can automatically turns on at whole night. Easy to install with attached screws or two-sided tape. leek, simple and rainproof design. They can be widely used on deck, step, stair, fence, pool, patio, wall, pathway and more.