San Diego Warning: You are not logged in. Your IP address will be publicly visible if you make any edits. If you log in or create an account, your edits will be attributed to your username, along with other benefits.Anti-spam check. Do not fill this in! PreviewAdvancedSpecial charactersHelpHeadingLevel 2Level 3Level 4Level 5FormatInsertLatinLatin extendedIPASymbolsGreekGreek extendedCyrillicArabicArabic extendedHebrewBanglaTamilTeluguSinhalaDevanagariGujaratiThaiLaoKhmerCanadian AboriginalRunesÁáÀàÂâÄäÃãǍǎĀāĂ㥹ÅåĆćĈĉÇçČčĊċĐđĎďÉéÈèÊêËëĚěĒēĔĕĖėĘęĜĝĢģĞğĠġĤĥĦħÍíÌìÎîÏïĨĩǏǐĪīĬĭİıĮįĴĵĶķĹĺĻļĽľŁłŃńÑñŅņŇňÓóÒòÔôÖöÕõǑǒŌōŎŏǪǫŐőŔŕŖŗŘřŚśŜŝŞşŠšȘșȚțŤťÚúÙùÛûÜüŨũŮůǓǔŪūǖǘǚǜŬŭŲųŰűŴŵÝýŶŷŸÿȲȳŹźŽžŻżÆæǢǣØøŒœßÐðÞþƏəFormattingLinksHeadingsListsFilesDiscussionReferencesDescriptionWhat you typeWhat you getItalic''Italic text''Italic textBold'''Bold text'''Bold textBold & italic'''''Bold & italic text'''''Bold & italic textDescriptionWhat you typeWhat you getReferencePage text.<ref>[https://www.example.org/ Link text], additional text.</ref>Page text.[1]Named referencePage text.<ref name="test">[https://www.example.org/ Link text]</ref>Page text.[2]Additional use of the same referencePage text.<ref name="test" />Page text.[2]Display references<references />↑ Link text, additional text.↑ Link text====Street lights==== [[File:Sandiego gaslampquarter (cropped).JPG|thumb|left|Street lights in the [[Gaslamp Quarter]]]] In the mid-20th century the city had [[mercury vapor]] street lamps. In 1978, the city decided to replace them with more efficient [[sodium vapor]] lamps. This triggered an outcry from [[astronomer]]s at [[Palomar Observatory]] {{convert|60|mi|km|sigfig=1}} north of the city, concerned that the new lamps would increase [[light pollution]] and hinder astronomical observation.<ref>{{cite news|url=https://www.nytimes.com/1983/08/14/us/astronomers-say-street-lights-will-blind-palomar.html|title=Astronomers say street lights will blind Palomar|last=Blakeslee|first=Sandra|date=August 14, 1983|work=The New York Times|access-date=February 20, 2014}}</ref> The city altered its lighting regulations to limit light pollution within {{convert|30|mi|km|sigfig=1}} of Palomar.<ref>{{cite web|url=http://www.sandiego.gov/planning/community/pdf/cpc/agendas/attachments/outdoorlighting.pdf|title=Outdoor lighting regulations|work=City of San Diego|access-date=February 20, 2014|archive-date=September 24, 2015|archive-url=https://web.archive.org/web/20150924114654/http://www.sandiego.gov/planning/community/pdf/cpc/agendas/attachments/outdoorlighting.pdf|url-status=dead}}</ref> In 2011, the city announced plans to upgrade 80% of its street lighting to new energy-efficient lights that use [[Electrodeless lamp|induction technology]], a modified form of [[fluorescent lamp]] producing a broader spectrum than sodium vapor lamps. The new system is predicted to save $2.2 million per year in energy and maintenance.<ref name="install">{{cite news|url=http://www.sdgln.com/news/2011/09/19/san-diego-install-brighter-more-efficient-streetlights|title=San Diego to install brighter, more efficient streetlights|date=September 19, 2011|work=San Diego Gay & Lesbian News|access-date=January 30, 2014}}</ref> The city stated the changes would "make our neighborhoods safer."<ref name = "install" /> They also increase [[light pollution]].<ref>[http://www.sandiego.gov/street-div/services/electrical/strlight.shtml City of San Diego official website, "Street Division: Electrical Street Lights"] {{Webarchive|url=https://web.archive.org/web/20140221083431/http://www.sandiego.gov/street-div/services/electrical/strlight.shtml |date=February 21, 2014 }} Retrieved February 15, 2014</ref> In 2014, San Diego announced plans to become the first U.S. city to install cyber-controlled street lighting, using an "intelligent" lighting system to control 3,000 [[LED]] street lights.<ref>{{cite news|url=http://dailyfusion.net/2014/01/san-diego-to-link-street-lights-to-industrial-internet-26286/|title=San Diego to Link Street Lights to Industrial Internet|work=Daily Fusion|access-date=January 30, 2014|archive-url=https://web.archive.org/web/20140202175840/http://dailyfusion.net/2014/01/san-diego-to-link-street-lights-to-industrial-internet-26286/|archive-date=February 2, 2014}}</ref> Summary: Please note that all contributions to Christianpedia may be edited, altered, or removed by other contributors. If you do not want your writing to be edited mercilessly, then do not submit it here. You are also promising us that you wrote this yourself, or copied it from a public domain or similar free resource (see Christianpedia:Copyrights for details). Do not submit copyrighted work without permission! Cancel Editing help (opens in new window) Discuss this page