Editing Lighthouse (section)

====Laser light====
[[File:Point Danger lighthouse.jpg|thumb|upright 0.6|[[Point Danger Light|Point Danger lighthouse]], [[Queensland]], 1971]]
Experimental installations of [[laser]] lights, either at high power to provide a "line of light" in the sky or, utilising low power, aimed towards mariners have identified problems of increased complexity in installation and maintenance, and high power requirements. The first practical installation, in 1971 at [[Point Danger Light|Point Danger lighthouse]], [[Queensland]], was replaced by a conventional light after four years, because the beam was too narrow to be seen easily.<ref>{{cite web |title=Point Danger Lighthouse |url=https://lighthouses.org.au/qld/point-danger-lighthouse/ |publisher=Lighthouses of Australia Inc. |access-date=11 August 2020 |language=en-AU |date=26 January 2018}}</ref><ref>{{cite journal |title=Lasers |journal=Aids to Navigation Manual |date=March 2010 |page=43 |publisher=[[International Association of Marine Aids to Navigation and Lighthouse Authorities]] |location=St Germain en Laye, France}}</ref>