Editing Eddystone Lighthouse (section)

===Later modifications===
[[File:EB1911 - Lighthouse - Fig. 57.—Eddystone Lighthouse.jpg|thumb|right|alt=Douglass's Eddystone lighthouse.|Photograph, c.1911, of Douglass's lighthouse (after removal of the bells).]]
In 1894 an explosive fog signal device was installed on the gallery of lighthouse; the fog bells were briefly retained as a standby provision, but then removed.<ref name="Renton2001" /> In 1904 the lamps were replaced with incandescent oil vapour burners.<ref name="EB" /> Following the invention of the mercury bath system (allowing a lighthouse optic to revolve in a trough of mercury rather than on rollers) the Eddystone lens pedestal was duly upgraded and the drive mechanism replaced.<ref name="Palmer2005">{{cite book |last1=Palmer |first1=Mike |title=Eddystone: The Finger of Light |date=2005 |publisher=Seafarer Books |location=Woodbridge, Suffolk |page=123}}</ref> Later, beginning in 1959, the light was electrified: the new light source was a 1,250W [[incandescent lamp]], powered by a diesel generator (three of which were installed in a lower store room).<ref name="Majdalany1960" /> In place of the old lenses a new, smaller (fourth-order) [[AGA AB|AGA]] 'bi-valve' optic was installed, which flashed at the faster rate of twice every ten seconds. The old optic was removed and donated to [[Southampton Maritime Museum]]<ref>{{Cite web|url=https://www.dailyecho.co.uk/heritage/14171096.the-weird-attractions-of-southamptons-royal-pier/|title=The weird attractions of Southampton's Royal Pier|date=29 December 2015|website=Daily Echo|accessdate=29 July 2024}}</ref> (it was exhibited on the [[Royal Pier, Southampton|Royal Pier]] in the 1970s, but later removed to a council yard where it was destroyed by vandals).<ref name="Palmer2005" /> As part of the programme of modernisation, the lighthouse was given a '[[Train horn#Leslie Controls, Inc.|SuperTyfon]]' fog signal, with compressors powered from the diesel generators.<ref name = "Renton2001">{{cite book |last1=Renton |first1=Alan |title=Lost Sounds: The Story of Coast Fog Signals |date=2001 |publisher=Whittles |location=Caithness, Scotland}}</ref>

[[File:Phare-d-Eddystone-Rocks.jpg|thumb|left|The lighthouse in 2005 (with helipad and solar panels) alongside the stub of Smeaton's Tower.]]
The lighthouse was automated in 1982, the first [[Trinity House]] 'Rock' (or offshore) lighthouse to be converted. Two years earlier the tower had been changed by construction of a [[helipad]] above the lantern, to allow maintenance crews access;<ref name=thinfo2>{{cite web | title = Eddystone Lighthouse | url = http://www.trinityhouse.co.uk/interactive/gallery/eddystone.html | publisher = Trinity House | access-date =30 December 2015 }}</ref> the helipad has a weight limit of 3600&nbsp;kg (3½ tons). As part of the automation of the lighthouse a new electric fog signal was installed and a metal halide [[discharge lamp]] replaced the incandescent light bulb formerly in use. The light and other systems were monitored remotely, initially by Trinity House staff at the nearby [[Penlee Point, Rame|Penlee Point]] [[fog signal station]].<ref name="NS1983">{{cite journal |last1=Auld |first1=Jack |title=Automation relieves the Eddystone keeper |journal=New Scientist |date=21 July 1983 |volume=99 |issue=1367 |page=213}}</ref> Since 1999 the lighthouse has run on solar power.<ref name="WoodmanWilson">{{cite book |last1=Woodman |first1=Richard |last2=Wilson |first2=Jane |title=The Lighthouses of Trinity House |date=2002 |publisher=Thomas Reed |location=Bradford-on-Avon, Wilts. |page=179}}</ref>