{"id":3,"date":"2022-01-18T16:25:05","date_gmt":"2022-01-18T21:25:05","guid":{"rendered":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/?p=3"},"modified":"2022-07-18T18:23:52","modified_gmt":"2022-07-18T22:23:52","slug":"main-body","status":"publish","type":"part","link":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/part\/main-body\/","title":{"raw":"Low Pressure Sodium Lamps","rendered":"Low Pressure Sodium Lamps"},"content":{"raw":"The low-pressure sodium (LPS) lamp is one of the most efficient lamp sources presently available, with some LPS lamps having an efficacy of close to 200 lumens per watt, which still outperforms current LED technologies.\r\n\r\n&nbsp;\r\n\r\n[caption id=\"attachment_271\" align=\"aligncenter\" width=\"962\"]<img class=\"wp-image-271 size-full\" src=\"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-content\/uploads\/sites\/1597\/2022\/01\/LPS-lamp-2.png\" alt=\"\" width=\"962\" height=\"210\" \/> Low Pressure Sodium Lamp[\/caption]\r\n\r\nThe main disadvantage to LPS lighting is that it produces light in only a very narrow portion of the spectrum, and so has a terrible CRI rating and is not appropriate for use where color discrimination is important. This is why LPS lamps are often used for roadway or street lighting where the quality of the light cast isn\u2019t as important as the quantity.\r\n\r\nWhile low-pressure sodium lamps are gas discharge lamps, they fall into neither the fluorescent lighting category, nor the High Intensity Discharge (HID) lamps, and so are often considered to be in a category all their own. Like other gas lighting technologies, LPS lamps require a ballast to operate.","rendered":"<p>The low-pressure sodium (LPS) lamp is one of the most efficient lamp sources presently available, with some LPS lamps having an efficacy of close to 200 lumens per watt, which still outperforms current LED technologies.<\/p>\n<p>&nbsp;<\/p>\n<figure id=\"attachment_271\" aria-describedby=\"caption-attachment-271\" style=\"width: 962px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-271 size-full\" src=\"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-content\/uploads\/sites\/1597\/2022\/01\/LPS-lamp-2.png\" alt=\"\" width=\"962\" height=\"210\" srcset=\"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-content\/uploads\/sites\/1597\/2022\/01\/LPS-lamp-2.png 962w, https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-content\/uploads\/sites\/1597\/2022\/01\/LPS-lamp-2-300x65.png 300w, https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-content\/uploads\/sites\/1597\/2022\/01\/LPS-lamp-2-768x168.png 768w, https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-content\/uploads\/sites\/1597\/2022\/01\/LPS-lamp-2-65x14.png 65w, https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-content\/uploads\/sites\/1597\/2022\/01\/LPS-lamp-2-225x49.png 225w, https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-content\/uploads\/sites\/1597\/2022\/01\/LPS-lamp-2-350x76.png 350w\" sizes=\"auto, (max-width: 962px) 100vw, 962px\" \/><figcaption id=\"caption-attachment-271\" class=\"wp-caption-text\">Low Pressure Sodium Lamp<\/figcaption><\/figure>\n<p>The main disadvantage to LPS lighting is that it produces light in only a very narrow portion of the spectrum, and so has a terrible CRI rating and is not appropriate for use where color discrimination is important. This is why LPS lamps are often used for roadway or street lighting where the quality of the light cast isn\u2019t as important as the quantity.<\/p>\n<p>While low-pressure sodium lamps are gas discharge lamps, they fall into neither the fluorescent lighting category, nor the High Intensity Discharge (HID) lamps, and so are often considered to be in a category all their own. Like other gas lighting technologies, LPS lamps require a ballast to operate.<\/p>\n","protected":false},"parent":0,"menu_order":6,"template":"","meta":{"pb_part_invisible":false,"pb_part_invisible_string":""},"contributor":[],"license":[],"class_list":["post-3","part","type-part","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-json\/pressbooks\/v2\/parts\/3","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-json\/pressbooks\/v2\/parts"}],"about":[{"href":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-json\/wp\/v2\/types\/part"}],"version-history":[{"count":7,"href":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-json\/pressbooks\/v2\/parts\/3\/revisions"}],"predecessor-version":[{"id":371,"href":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-json\/pressbooks\/v2\/parts\/3\/revisions\/371"}],"wp:attachment":[{"href":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-json\/wp\/v2\/media?parent=3"}],"wp:term":[{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-json\/wp\/v2\/contributor?post=3"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-json\/wp\/v2\/license?post=3"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}