{"id":51,"date":"2022-01-18T16:34:15","date_gmt":"2022-01-18T21:34:15","guid":{"rendered":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/chapter\/diameter-of-bulbs\/"},"modified":"2022-09-14T15:57:04","modified_gmt":"2022-09-14T19:57:04","slug":"diameter-of-bulbs","status":"publish","type":"chapter","link":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/chapter\/diameter-of-bulbs\/","title":{"raw":"Shape and Diameter of Common Lamps","rendered":"Shape and Diameter of Common Lamps"},"content":{"raw":"In the lighting field, lamp bulbs are identified with a <span style=\"text-decoration: underline\"><strong>letter code<\/strong><\/span> to identify the overall shape of the bulb, and a <span style=\"text-decoration: underline\"><strong>numerical designation<\/strong><\/span> that represents the widest diameter of that bulb in eighths of inches (1\/8).\r\n\r\nFor example, a T8 fluorescent lamp would have a tubular (T) shape and a diameter of 8 eighths of an inch, or 1 inch, while a T12 would have a diameter of 12 eighths or 1 and 1\/2 inches.\r\n\r\nLamps may also include voltage or power ratings, which can be used to make sure that any lamp installed in a lighting fixture will not exceed its rated value of current and reduce the risk of fire or electrical hazards.\r\n\r\n<img class=\"aligncenter wp-image-158 size-full\" src=\"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-content\/uploads\/sites\/1597\/2022\/01\/Lightbulb-shapes.png\" alt=\"\" width=\"640\" height=\"360\" \/>\r\n\r\nEX: A multifaceted reflector, or MR 16 lamp, has a diameter of 2 inches or 16 eighths of an inch.\r\n\r\n<img class=\"aligncenter wp-image-55 size-full\" src=\"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-content\/uploads\/sites\/1597\/2022\/01\/MR-16.png\" alt=\"\" width=\"640\" height=\"360\" \/>\r\n\r\n&nbsp;","rendered":"<p>In the lighting field, lamp bulbs are identified with a <span style=\"text-decoration: underline\"><strong>letter code<\/strong><\/span> to identify the overall shape of the bulb, and a <span style=\"text-decoration: underline\"><strong>numerical designation<\/strong><\/span> that represents the widest diameter of that bulb in eighths of inches (1\/8).<\/p>\n<p>For example, a T8 fluorescent lamp would have a tubular (T) shape and a diameter of 8 eighths of an inch, or 1 inch, while a T12 would have a diameter of 12 eighths or 1 and 1\/2 inches.<\/p>\n<p>Lamps may also include voltage or power ratings, which can be used to make sure that any lamp installed in a lighting fixture will not exceed its rated value of current and reduce the risk of fire or electrical hazards.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-158 size-full\" src=\"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-content\/uploads\/sites\/1597\/2022\/01\/Lightbulb-shapes.png\" alt=\"\" width=\"640\" height=\"360\" \/><\/p>\n<p>EX: A multifaceted reflector, or MR 16 lamp, has a diameter of 2 inches or 16 eighths of an inch.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-55 size-full\" src=\"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-content\/uploads\/sites\/1597\/2022\/01\/MR-16.png\" alt=\"\" width=\"640\" height=\"360\" \/><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"author":848,"menu_order":4,"template":"","meta":{"pb_show_title":"on","pb_short_title":"","pb_subtitle":"","pb_authors":["alee59"],"pb_section_license":"all-rights-reserved"},"chapter-type":[],"contributor":[61],"license":[59],"class_list":["post-51","chapter","type-chapter","status-publish","hentry","contributor-alee59","license-all-rights-reserved"],"part":41,"_links":{"self":[{"href":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-json\/pressbooks\/v2\/chapters\/51","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-json\/pressbooks\/v2\/chapters"}],"about":[{"href":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-json\/wp\/v2\/types\/chapter"}],"author":[{"embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-json\/wp\/v2\/users\/848"}],"version-history":[{"count":1,"href":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-json\/pressbooks\/v2\/chapters\/51\/revisions"}],"predecessor-version":[{"id":362,"href":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-json\/pressbooks\/v2\/chapters\/51\/revisions\/362"}],"part":[{"href":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-json\/pressbooks\/v2\/parts\/41"}],"metadata":[{"href":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-json\/pressbooks\/v2\/chapters\/51\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-json\/wp\/v2\/media?parent=51"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-json\/pressbooks\/v2\/chapter-type?post=51"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-json\/wp\/v2\/contributor?post=51"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/basiclightingforelectricianslevel2\/wp-json\/wp\/v2\/license?post=51"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}