Beaver Dam Woodworks 3' Poly Lighthouse 3' Poly Lighthouse. Patriotic. 3' lighthouse measures 3' tall with 15.5" outside bottom diameter, 10.5" inside bottom diameter, 5.875" inside top diameter and 19" inside height. All lighthouses come with a standard 25 watt incandescent bulb. Our Poly lighthouses are maintenance free and will not splinter, crack or fade and never need painting. They are environmentally friendly and made from a recycled material. Handcrafted in the United States by Expert Amish Woodworkers.