File:Pladda Lighthouse - Isle Of Arran (39634102674).jpg

Pladda Lighthouse was built on the pear-shaped island of Pladda, off the South East corner of Arran. Lighted in October 1790, it joined those on the Mull of Kintyre, Cumbrae in the Firth of Clyde, and Copeland light on the Irish coast. It soon had to be distinguished from these three by showing a lower light from a small lantern 20 feet below the original one - an arrangement that was soon made permanent and was to operate for more than 100 years. In 1870 trials were carried out at Pladda with paraffin, a light material oil which now superseded colya, just as that on Joseph Mumi's recommendation had succeeded sperm oil. In 1874 the Commissioners ordered sirens driven by hot air engines from America. Pladda was about the third station in 1876 to have a fog signal.

In 1901 fixed lights were no longer regarded as suitable for the great landfall and coastal lights and a powerful group flashing light was installed.

Provisions and other light stores were brought to the lighthouse by boatmen permanently attached to the station and they also carried out the reliefs. These attending boats were limited to 4 visits to the rock per month, 2 on Sundays to enable the lightkeepers to attend church. All this changed in 1972 with the introduction to the service of the helicopter, which was used to transport the keepers back and forward.