Port Sanilac Light placement and the unique shape were dictated by and created because of budgetary constraints (Congress appropriated only half the money requested). Designed by Eleventh District Engineer Captain Charles E. L. B. Davis, the design has been called "both unique and architecturally significant in its elegance." The tower is white with a red roof. This "handsome" lighthouse shares its design with only one other, Ile Aux Galets, also known as Skilligallee Island Light, on Lake Michigan. The Port Sanilac Light tower is capped with a cast iron lantern room, which still houses a fourth order Fresnel lens manufactured by Barbier and
Light characteristic Light characteristic A light characteristic is a graphic and text description of a navigational light sequence or colour displayed on a nautical chart or in a Light List with the chart symbol for a lighthouse, lightvessel, buoy or sea mark with a light on it. The graphic indicates how the real light may be identified when looking at its actual light output type or sequence. Different lights use different colours, frequencies and light patterns, so mariners can identify which light they are seeing. While light characteristics can be described in prose, e.g. "Flashing white every three seconds", lists of lights