Casquets lighthouses per ton of ship when vessels passed the rocks and in turn he paid Trinity House 50 pounds per year for the right to run the lighthouses. The lighthouses reverted to Trinity House in 1785. They were converted to oil lamps with metal reflectors which were first used on 25 November 1790; and upgraded again with apparatus to rotate a beam of light in 1818. This had a clockwork mechanism which was wound up every hour and a half and gave one flash every 15 seconds. The lighthouses were badly damaged and the lanterns smashed in a severe storm on
Caloundra Lighthouses active and in situ: Grassy Hill (1886, Grassy Hill Light) at Cooktown and Goods Island (1886) in the Torres Strait. The 1968 lighthouse and signal station is one of only two constructed to this design in Australia, the only one to survive, and one of a small number of concrete lighthouses built in Queensland. In the combination of lighthouse, signals and radar functions in the one structure, the 1968 lighthouse and its ancillary generator shed are important in demonstrating the range of lightstation structures designed for particular locations. Together, the two lighthouses on Caloundra Head, which are both substantially intact