Commissioners of Irish Lights

The Commissioners of Irish Lights (Irish: Coimisinéirí Soilse na hÉireann), 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.

Source: Wikipedia — Commissioners of Irish Lights (CC BY-SA 4.0)