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The Faucher Family in Delaware have built extravagant Christmas lights setups for 25 years now. How extravagant? They use 1,000,000 lights. So how much does it cost them to run the lights for a month? $82,320. Gulp.
HouseLogic estimated the total cost by using the average price per kWh in the Faucher Family's region and assumed each of their 1,000,000 bulbs were the average 5 watt C7 bulb. They then figured the lights to run for 4 hours each night and 30 nights in total. The estimated cost came out to be $686/hour and $82,320 for those bright 30 nights. A lot of money to get in the Christmas spirit!
If the Fauchers use LEDS, their estimate would drop down to $89 hour and $10,680. For their sake, let's hope they do.
In order to determine a more accurate figure, we went back to the Christmas Light Source calculator with a bit of our own data. Using the Department of Energy's latest average cost-per-kilowatt-hour for the state of Delaware ($0.1402), the cost for one million C7 bulbs came to $701 per hour, even higher than House Logic's number ($686). When the one million was applied instead to mini lights, the number dropped to $63.09 per hour. A substantial sum, no doubt, but still just 9 percent of the earlier estimate and cheaper even than C7-equivalent LEDs. Given four hours of use per day, the total cost for the month of a million lights? $7,570.80. Now, to be fair, it's unlikely that all the lights are mini-bulbs, so we computed what it would cost to light the house if half the bulbs were C7-size and half minis: $45,844.80. Undoubtedly a pricey taste of holiday cheer, but still an unrealistic scenario in itself and, even still, a far cry from $82K.