 The platform is all that remains of the original structure and supports an automated bell which chimes every ten seconds and red light mounted on a pole, which flashes on for three seconds and is then dark for 3 seconds in each six second cycle (Iso R 6s).Southampton Shoal Lighthouse was a square building built on a platform supported by wooden piers.It was built and first lit in 1905 with a fifth order Fresnel lens.