{"id":205,"date":"2021-04-03T20:19:04","date_gmt":"2021-04-04T00:19:04","guid":{"rendered":"https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/?post_type=chapter&p=205"},"modified":"2021-04-21T14:45:16","modified_gmt":"2021-04-21T18:45:16","slug":"energy-cost-example-2-25000-hours","status":"publish","type":"chapter","link":"https:\/\/pressbooks.bccampus.ca\/lightingforelectricians\/chapter\/energy-cost-example-2-25000-hours\/","title":{"raw":"Energy Cost Example 2 - 25,000 hours","rendered":"Energy Cost Example 2 – 25,000 hours"},"content":{"raw":"Now we will compare the same lamps over a 25,000 hour period. Recall that the 100-watt incandescent lamp costs $1.20 to purchase and has an average lamp life of 1000 hours, while the 25-watt LED lamp costs $30.00 and lasts 25,000 hours. If the cost of energy is $0.09 per kilowatt-hour.\r\n\r\nDetermine the electrical cost of running each load for 25,000 hours.\r\n\r\n \r\n\r\nIncandescent electrical cost:\r\n\r\n \r\n\r\n\"\"\r\n\r\nLED electrical cost:\r\n\r\n \r\n\r\n\"\"\r\n\r\nFactoring in the cost of the lamps and we can determine the total cost of each lighting system for 25,000 hours.\r\n\r\n \r\n\r\nIncandescent total cost:\r\n\r\n \r\n\r\n\"\"\r\n\r\nLED total cost:\r\n\r\n \r\n\r\n\"\"\r\n\r\nWhile the LED has a high initial cost of $30.00, due to its extended lifespan it actually costs just as much as the incandescent lamps since we would need approximately 25 incandescent lamps for the 25,000 hour period. (25 x $1.20 = $30.00).\r\n\r\nThe LEDs massive savings in energy use and extended lifespan make it the preferred choice for lighting installations.\r\n\r\n ","rendered":"

Now we will compare the same lamps over a 25,000 hour period. Recall that the 100-watt incandescent lamp costs $1.20 to purchase and has an average lamp life of 1000 hours, while the 25-watt LED lamp costs $30.00 and lasts 25,000 hours. If the cost of energy is $0.09 per kilowatt-hour.<\/p>\n

Determine the electrical cost of running each load for 25,000 hours.<\/p>\n

 <\/p>\n

Incandescent electrical cost:<\/p>\n

 <\/p>\n

\"\"<\/p>\n

LED electrical cost:<\/p>\n

 <\/p>\n

\"\"<\/p>\n

Factoring in the cost of the lamps and we can determine the total cost of each lighting system for 25,000 hours.<\/p>\n

 <\/p>\n

Incandescent total cost:<\/p>\n

 <\/p>\n

\"\"<\/p>\n

LED total cost:<\/p>\n

 <\/p>\n

\"\"<\/p>\n

While the LED has a high initial cost of $30.00, due to its extended lifespan it actually costs just as much as the incandescent lamps since we would need approximately 25 incandescent lamps for the 25,000 hour period. (25 x $1.20 = $30.00).<\/p>\n

The LEDs massive savings in energy use and extended lifespan make it the preferred choice for lighting installations.<\/p>\n

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