North Ronaldsay Lighthouse Optic:
The video shows the rotation of the optic at North Ronaldsay lighthouse in the Orkney Islands of Scotland. [Ken Trethewey (2016)]
The video shows the rotation of the optic at the Longstone lighthouse in the Farne Islands of NE England. [Ken Trethewey (2012)]
St Catherine's Lighthouse Optic in Slow Motion: St. Catherine's is on the southern tip of the Isle of Wight in England. [Ken Trethewey (2016)]