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Souter Lighthouse will mark its 150th anniversary in January 2021
Trinity House, the organisation which is still responsible for lighthouses today, recognised that a new beacon was needed, and work began to create Souter.
Kate Devlin, National Trust Collections and House Officer at Souter Lighthouse, said: “We’re proud of the fact that Souter plays an important part in the history of lighthouses.
"It was designed by Sir James Douglass, who was engineer-in-chief to Trinity House, as the first lighthouse purpose-built to use an electric light.
"This was a huge leap as, at that time, lighthouses were usually lit with oil lamps. This new technology was very exciting and meant a brighter, more reliable light could be produced by an arc lamp.”