{"id":187,"date":"2021-04-03T19:44:44","date_gmt":"2021-04-03T23:44:44","guid":{"rendered":"https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/?post_type=chapter&#038;p=187"},"modified":"2021-04-21T14:44:57","modified_gmt":"2021-04-21T18:44:57","slug":"energy-cost-example-1","status":"publish","type":"chapter","link":"https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/chapter\/energy-cost-example-1\/","title":{"raw":"Energy Cost Example 1 - 1000 Hours","rendered":"Energy Cost Example 1 &#8211; 1000 Hours"},"content":{"raw":"For example, a 100 W incandescent lamp costs $1.20 to purchase and has an average lamp life of 1000 hours, while a 25 W LED lamp costs $30.00 and lasts 25,000 hours. If the cost of energy is $0.09 per kilowatt-hour, determine the electrical cost of running each load for 1000 hours.\r\n\r\n&nbsp;\r\n\r\nIncandescent electrical cost:\r\n\r\n<img class=\"aligncenter wp-image-198 size-full\" src=\"https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/04\/Cost-ex-1000-h-incandescent.png\" alt=\"\" width=\"833\" height=\"155\" \/>\r\n\r\nLED electrical cost:\r\n\r\n<img class=\"aligncenter wp-image-199 size-full\" src=\"https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/04\/Cost-ex-1000-h-LED.png\" alt=\"\" width=\"833\" height=\"155\" \/>\r\n\r\nWhile the LED clearly costs less to run for 1000 hours, its high initial cost of $30.00 makes it the more expensive choice compared to the $1.20 initial cost for the incandescent lamp.\r\n\r\n&nbsp;\r\n\r\nIncandescent total cost:\r\n\r\n<img class=\"aligncenter wp-image-201 size-full\" src=\"https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/04\/Cost-ex-1000-h-incandescent-total-.png\" alt=\"\" width=\"834\" height=\"155\" \/>\r\n\r\nLED total cost:\r\n\r\n<img class=\"aligncenter wp-image-202 size-full\" src=\"https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/04\/Cost-ex-1000-h-LED-total.png\" alt=\"\" width=\"834\" height=\"156\" \/>","rendered":"<p>For example, a 100 W incandescent lamp costs $1.20 to purchase and has an average lamp life of 1000 hours, while a 25 W LED lamp costs $30.00 and lasts 25,000 hours. If the cost of energy is $0.09 per kilowatt-hour, determine the electrical cost of running each load for 1000 hours.<\/p>\n<p>&nbsp;<\/p>\n<p>Incandescent electrical cost:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-198 size-full\" src=\"https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/04\/Cost-ex-1000-h-incandescent.png\" alt=\"\" width=\"833\" height=\"155\" srcset=\"https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/04\/Cost-ex-1000-h-incandescent.png 833w, https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/04\/Cost-ex-1000-h-incandescent-300x56.png 300w, https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/04\/Cost-ex-1000-h-incandescent-768x143.png 768w, https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/04\/Cost-ex-1000-h-incandescent-65x12.png 65w, https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/04\/Cost-ex-1000-h-incandescent-225x42.png 225w, https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/04\/Cost-ex-1000-h-incandescent-350x65.png 350w\" sizes=\"auto, (max-width: 833px) 100vw, 833px\" \/><\/p>\n<p>LED electrical cost:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-199 size-full\" src=\"https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/04\/Cost-ex-1000-h-LED.png\" alt=\"\" width=\"833\" height=\"155\" srcset=\"https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/04\/Cost-ex-1000-h-LED.png 833w, https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/04\/Cost-ex-1000-h-LED-300x56.png 300w, https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/04\/Cost-ex-1000-h-LED-768x143.png 768w, https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/04\/Cost-ex-1000-h-LED-65x12.png 65w, https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/04\/Cost-ex-1000-h-LED-225x42.png 225w, https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/04\/Cost-ex-1000-h-LED-350x65.png 350w\" sizes=\"auto, (max-width: 833px) 100vw, 833px\" \/><\/p>\n<p>While the LED clearly costs less to run for 1000 hours, its high initial cost of $30.00 makes it the more expensive choice compared to the $1.20 initial cost for the incandescent lamp.<\/p>\n<p>&nbsp;<\/p>\n<p>Incandescent total cost:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-201 size-full\" src=\"https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/04\/Cost-ex-1000-h-incandescent-total-.png\" alt=\"\" width=\"834\" height=\"155\" srcset=\"https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/04\/Cost-ex-1000-h-incandescent-total-.png 834w, https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/04\/Cost-ex-1000-h-incandescent-total--300x56.png 300w, https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/04\/Cost-ex-1000-h-incandescent-total--768x143.png 768w, https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/04\/Cost-ex-1000-h-incandescent-total--65x12.png 65w, https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/04\/Cost-ex-1000-h-incandescent-total--225x42.png 225w, https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/04\/Cost-ex-1000-h-incandescent-total--350x65.png 350w\" sizes=\"auto, (max-width: 834px) 100vw, 834px\" \/><\/p>\n<p>LED total cost:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-202 size-full\" src=\"https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/04\/Cost-ex-1000-h-LED-total.png\" alt=\"\" width=\"834\" height=\"156\" srcset=\"https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/04\/Cost-ex-1000-h-LED-total.png 834w, https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/04\/Cost-ex-1000-h-LED-total-300x56.png 300w, https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/04\/Cost-ex-1000-h-LED-total-768x144.png 768w, https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/04\/Cost-ex-1000-h-LED-total-65x12.png 65w, https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/04\/Cost-ex-1000-h-LED-total-225x42.png 225w, https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/wp-content\/uploads\/sites\/1349\/2021\/04\/Cost-ex-1000-h-LED-total-350x65.png 350w\" sizes=\"auto, (max-width: 834px) 100vw, 834px\" 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