The Gama Sonic Imperial Bulb is a single lamp head with cast aluminum construction featuring a modern design that complements both residential and commercial properties. This solar post light comes with all necessary hardware for mounting and can be placed on any 3-inch outside diameter pole or 3-inch pier/ flat base. Gama Sonic’s Trapezoidal Technology increases the solar panel’s output and efficiency. With larger, trapezoid-shaped solar panels, we fully utilize the available surface area for maximal solar charging.