Unlike other's 2 LEDs, the GIGALUMI white solar deck lights consist of 3 LED lights which means producing more light for your garden, yard, deck, walkway, steps and stairs. The step lights outdoor are powered by the sun, which automatically charges in the daytime and works at night. Charge for 6-8 hours in the sun during the day and bring 8-10 hours of lighting at night. The solar step lights are bright and very suitable for the decoration of gardens, courtyards and walkways. It can also provide a good atmosphere for Christmas, Halloween, Weddings and Birthday Parties. Use screws and expansion screws to install the solar stair lights, or buy double-sided (NOT INCLUDED) adhesive to stick the solar powered deck lights where direct sunlight is available. The waterproof grade of the led solar powered deck lights is IP44,designed to withstand sunny days, rainy nights, and small snowy days. In any case the 12 Pack Stainless Steel solar step lights stop working, just contact us, we will help you solve the problem as soon as possible.