{"id":56,"date":"2021-03-25T19:30:32","date_gmt":"2021-03-25T23:30:32","guid":{"rendered":"https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/chapter\/diameter-of-bulbs\/"},"modified":"2021-04-21T14:50:45","modified_gmt":"2021-04-21T18:50:45","slug":"diameter-of-bulbs","status":"publish","type":"chapter","link":"https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/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 lamb 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> the represents the widest diameter of that bulb in (1\/8) eighths of inches.\r\n\r\nFor example, a T8 fluorescent lamp would have a tubular (T) shape, and a diameter of 1 inch, or 8 eighths of an inch, while a T12 would have a diameter of 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\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/03\/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\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/03\/MR-16.png\" alt=\"\" width=\"640\" height=\"360\" \/>\r\n\r\n&nbsp;","rendered":"<p>In the lighting field lamb 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> the represents the widest diameter of that bulb in (1\/8) eighths of inches.<\/p>\n<p>For example, a T8 fluorescent lamp would have a tubular (T) shape, and a diameter of 1 inch, or 8 eighths of an inch, while a T12 would have a diameter of 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\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/03\/Lightbulb-shapes.png\" alt=\"\" width=\"640\" height=\"360\" srcset=\"https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/03\/Lightbulb-shapes.png 640w, https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/03\/Lightbulb-shapes-300x169.png 300w, https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/03\/Lightbulb-shapes-65x37.png 65w, https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/03\/Lightbulb-shapes-225x127.png 225w, https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/03\/Lightbulb-shapes-350x197.png 350w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/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\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/03\/MR-16.png\" alt=\"\" width=\"640\" height=\"360\" srcset=\"https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/03\/MR-16.png 640w, https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/03\/MR-16-300x169.png 300w, https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/03\/MR-16-65x37.png 65w, https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/03\/MR-16-225x127.png 225w, https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/03\/MR-16-350x197.png 350w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"author":103,"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":[58],"class_list":["post-56","chapter","type-chapter","status-publish","hentry","contributor-alee59","license-all-rights-reserved"],"part":42,"_links":{"self":[{"href":"https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-json\/pressbooks\/v2\/chapters\/56","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-json\/pressbooks\/v2\/chapters"}],"about":[{"href":"https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-json\/wp\/v2\/types\/chapter"}],"author":[{"embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-json\/wp\/v2\/users\/103"}],"version-history":[{"count":5,"href":"https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-json\/pressbooks\/v2\/chapters\/56\/revisions"}],"predecessor-version":[{"id":394,"href":"https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-json\/pressbooks\/v2\/chapters\/56\/revisions\/394"}],"part":[{"href":"https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-json\/pressbooks\/v2\/parts\/42"}],"metadata":[{"href":"https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-json\/pressbooks\/v2\/chapters\/56\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-json\/wp\/v2\/media?parent=56"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-json\/pressbooks\/v2\/chapter-type?post=56"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-json\/wp\/v2\/contributor?post=56"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-json\/wp\/v2\/license?post=56"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}