The solar panels convert sunlight into electricity during day time and recharge the battery. At night, the light turns on automatically. There are absolutely no wiring to the lights and they are easy to install. These lights can light up nearly whole night when fully charged. Automatic sensor activates at dusk. Each light is made of stainless steel durable for years of use in all weather conditions. These solar ground spots are perfect for outdoor lighting such as landscape, garden or swimming pool,etc. This product ships in approximately 1 days