The Ultra Bright Solar Flagpole Top Light is solar-powered, designed to mount on the top of your flagpole (up to 45ft.), and illuminate downward. This solar powered light will charge with daylight and provides 1,500 lumens of LED light during dusk. The Ultra Bright Solar Flagpole Top Light includes (3) internal 1500 mAh batteries and a powerful 6v (6 cells) solar panel, which will fully charge on a sunny day and bank the solar power for a less sunny day. You will never have to replace the batteries which are constantly being recharged by solar power. This is an all in one solar powered unit. No wires, no maintenance. Set it and forget about it.