This working Optic is the light from Baily lighthouse in Howth, North Dublin. It was installed in 1902 and removed in 1972 when the lighthouse was modernised. The lighthouse was originally gas, then vaporised paraffin powered, the light was equivalent to 2,000,000 candle power. The optic now shines a lesser light over the museum.
Michael Kennedy, author of Guarding Neutral Ireland, discusses the role of the Look Out Posts, in this case, the LOP on Howth Head, in recording events in the Irish Sea during World War II, known as "The Emergency".