These Solar Powered Stainless Steel Garden Post Lights are ideal for patios, paths, borders, ponds and driveways. They convert energy from the sun during the day into electricity, at no cost.The lights have rechargeable batteries inside which save the energy converted by the solar panels on the top and use it to power the long life, super bright LED lights when it is dark.When powered \"on\" these solar lights automatically switch on in the evening and off again in the morning when it gets light.Please note: Solar LED lighting is dependent on the amount of sunlight they get each day. The run time will be reduced during non-summer months as charge times are reduced by hours of daylight and light strength.