18th December

New guiding light for mariners at Inisheer Lighthouse

The Commissioners of Irish Lights (CIL) have unveiled a new light emitting diode (LED) light for the Inisheer lighthouse that marks the south-eastern end of the Aran Islands and the western side of the southern approach to Galway Bay.

Inisheer-2 Colin-Day-CIL

Inisheer Lighthouse. Photo Colin Day, CIL

This lighthouse is a highly important Aid to Navigation (AtoN) safeguarding considerable traffic between Inisheer and Co Clare. The tower at 34m in height ensures visibility of the light due to the low lying nature of the island. A red sector delineates the potential danger of Finnis Rock lying to the east.

 The project will provide reliable and low maintenance operational needs for the next 20 years while achieving a 16% reduction in annual operating costs. The new flashing LED light source replaces the optic lamp in the existing lens. 

The light range is now reduced from 20White, 16Red to 18White, 11Red but will keep the same flashing character. The rotating mirror located in the tower has been removed and preserved  for heritage purposes.

A 6kW Standby Diesel Generator has been removed and replaced by duplicated 24V batteries and chargers of total capacity to provide 6 days operation. The Radar Beacon (RACON) has also been replaced.

With the help of modern technology, CIL is delivering a low-maintenance, low-energy and carbon-emission reducing Aids to Navigation service around the coast of Ireland. 

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