Casey Chan writes on Gizmodo:
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!