This set of 600 battery operated timer lights is powered by batteries rather than mains or solar power making it perfect for lighting any area of the home or garden without the need for power sockets and direct sunlight the timer function is simple to operate simply press the button and the lights will automatically stay on for 6 hours then turn off for 18 hours meaning no more climbing out of bed when you remember you havent turned the lights off a perfect alternative to solar and mains