A geographic coordinate system is a coordinate system that enables every location on the Earth to be specified by a set of numbers or letters, or symbols.
1 This average monthly residential electricity bill in North Carolina is 9.35% greater than the national average monthly bill of $107. 2  Average monthly residential electricity bills in the U.S. range from approximately $75 to $203. Poverty level: Approximately 17 percent of households in NC have incomes below the poverty level. 2  Electric bills: The average residential electricity bill in North Carolina is about $117/month, ranking 14th in the U.S. and 9.35% greater than the national average of $107.
Your numbers are wrong in several aspects, First the average residential electric bill is $96.50 per month and the average lighting percentage is 10 -15 percent, that would mean a $ 9.60 to 14.50 per month. And you will not save 80 to 85 percent going to fluorescent.