The solar light is designed to work with small 5-8 foot outdoor flagpoles. It measures less than 5 1/2 inches in diameter and weighs only 5 ounces. Included with the solar light are three angle adjustable adaptors to accomodate a variety of one inch diameter poles, including spinning poles. The light source is super bright LED's which can work up to eight hours at night after a full sunny day of charging. The solar light is easy to install and comes with self charging batteries.