These solar powered fence post lights have an ultra-bright LED and are easy to install, making it easy to get light without having to hookup a bunch of wires. Automatic dusk-to-dawn operation so you don't have to worry about turning the lights on and off.. Also has an On/Off override switch. These lights are water and corrosion resistant. Sun Powered No Wiring On/Off switch Ultra Bright LED Powered by the sun Fast & easy install Rechargeable Ni-Cd AA battery included Energy, electrical saving Ideal for areas where conventional electrical supply is not available One High output long lasting ultra-bright LED bulb More expensive ultra-highly sensitive solar panel usually seen on calculators is used Automatic dusk-to-dawn operation, On/off manual over-ride switch Recharged by solar panel under sunlight Light turns on automatically when dark Safe Water Resistant Corrosion resistant CE certified