Eilean Glas Lighthouse was one of the original four lights to be commissioned by the Commissioners of the Northern Lights and the first in the Hebrides (the others were Kinnaird Head, Mull of Kintyre and North Ronaldsay).
The engineer who built these lighthouses was Thomas Smith. The light was first displayed in 1789 and the original tower was replaced in 1824 by Smith's stepson Robert Stevenson.
Photo credit: Chris McLean