The current lighthouse was built in 1751 by Thomas Fonnereau, the landowner who finally made the economics work. He did something unusual: he built two towers, joined by keepers' cottages, each topped with a coal-fired brazier. The pair was meant to be unmistakable - any vessel seeing only one light knew it was looking at something else. Inside each tower stood a fixed arrangement of nineteen oil lamps with reflectors. That setup was so durable that by 1873, more than a century later, the original lamps and reflectors were still in use. The wrecks at the Point that year forced the issue. New optics were ordered: medium-sized catadioptric lenses designed by John Hopkinson of the Birmingham firm Chance Brothers, one on each tower. Modernisation had begun.

On 29 March 1878, electric lights were first lit at the Lizard, powered by Siemens dynamos. The same year a steam-driven fog siren began sounding, one blast every five minutes through a 15-foot horizontal horn that could be swivelled depending on the wind. In 1885 the dynamos were upgraded to more powerful de Meritens magneto-electric generators. By 1903 a still bigger leap: the western tower's lantern was removed entirely, and a single four-panel rotating optic designed by Thomas Matthews replaced the old fixed lens in the eastern tower. The official announcement called it a 'new revolving light of very great power' visible between 40 and 50 miles. By 1908, automatic systems - emergency acetylene backups, lamp changers, automatic winding for the lens drive - let the station drop its staff from five keepers to three. The machinery aged honourably. The 1885 magnetos kept turning until 1950, when mains electricity finally arrived and four Gardner diesels were installed as backup. The clockwork that drove the rotating optic ran until 1972.

Automation came in 1998. The last keepers left, and the great compressed-air fog siren - by then the last of its kind still operating in the United Kingdom - was silenced and replaced with a modern electronic signal. The rotating optic, more than a century after Thomas Matthews drew it, still turns. The light still reaches forty-some miles out into the Channel. One of the old magneto-electric generators sits today in Thinktank, Birmingham's science museum; the other remains in the engine house at the Lizard, in situ on the floor where it earned its keep for sixty-five years. Two of the four Gardner diesels went to the Internal Fire Museum of Power in Wales. The other two stayed put.

For generations of sailors crossing back from the Americas, Africa, or the Mediterranean, the Lizard light was the first piece of England that announced itself. On a clear night its reflected glow could be seen 100 miles out at sea. Captains kept their watches on, sometimes for days, waiting for the first faint pulse on the horizon. The lighthouse heritage centre, set in the old engine room with two of the original compressors still in place, told that story to visitors until it closed in 2023 with no sign of reopening. The cottages around the towers are holiday lets now. The white twins on the cliff still do their job. Britain, from the south, still starts here.