description: free of maintainance, economically and easy for use. working by light sensor. stops working in daytime and the battery is recharged. No maintain, just post in the garden. It will be charged at day time and light on at night. Very environmental The light is powered by solar energy through 0.35watts amorphous solar panel and built-in 1 piece of “AA” Ni-Cd rechargeable battery. The solar panel converts sunlight into electric energy , then charges battery during daytime and the light sensor turns on the light automatically at night.