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1971 - Guinness Book of Records
In the 1971 edition of the Guinness Book of Records it was incorrectly reported that Orfordness Lighthouse was the brightest Lighthouse in the United Kingdom. The extract from that edition, on page 120, reads:
“The lighthouse in the United Kingdom with the most powerful light is the shorelight Orfordness, Suffolk. It has an intensity of 7,500,000 candelas. The Irish Light with the greatest intensity is Aranmore on Rinrawros Point, County Donegal.”
This was retracted in the subsequent edition and I believe the reason for the incorrect entry was because one too many zero’s were added to the intensity during submission.
The current lamp and optic configuration of the Lighthouse produces 635,000 candelas.
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