BEWARE OF THE DOG [IRISH LIGHTS HQ IN DUN LAOGHAIRE]

The Commissioners of Irish Lights, often shortened to Irish Lights or CIL, is the body that serves as the general lighthouse authority for Northern Ireland and the Republic of Ireland and their adjacent seas and islands. As the lighthouse authority for the island of Ireland it oversees the coastal lights and navigation marks provided by the local lighthouse authorities, the county councils and port authorities.

It is funded by light dues paid by ships calling at ports in the Republic of Ireland, pooled with dues raised similarly in the United Kingdom. This recognises that a large volume of shipping, typically transatlantic, relies on the lights provided by Irish Lights.