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 who constructed additional lightstatons and made substantial upgrades to existing lights, with many lighthouses converted to unattended acetylene lights. The bulk of the expenditure was concentrated north of Cooktown where seven new lighthouses were constructed to guide ships through the Torres Strait and the Great Barrier Reef. Manned lighthouses were phased out in favour of less expensive, utilitarian-designed, unmanned structures. Caloundra Head Lighthouse continued to signal the entrance to the North West Channel to the Port of Brisbane and by 1929 investment in new navigation marks and dredging to increase the depth of the channel ensured that most of the