For instance, you could kiss your kids on their heads rather than their cheeks for a few days. You could ask your spouse to do bedtime stories and baths for a few nights. But obviously, you canât be so careful in your efforts to prevent germs from spreading that you feel like youâre shunning your kids.
If you grow short plants, you should definitely try LEDs. 1  The first series of costs on the chart represents an electricity cost of $0.12/kwH, or 12 cents per kilowatt hour (a kilowatt hour is 1,000 watts being used for one hour). 2  $0.12/kwH was the US national average cost for electricity in 2011.
($7.37/kW)(100 W)(kW/1000 W) = $0.74. The energy charge for using a 100âwatt light bulb during any 15âminute period of the month is: ($0.033/kWh)(100 W)(kW/1000W)(15 min) (1 hour/60 min) = $0.00083. Figure 1âThe MTDC offices were built in the late. 1800's or early 1900's.he 223 hours equals 1 month of use at 10 hours per day and 22 days per month. Calculating the cost per kilowatt hour during the peak demand interval further illustrates the high cost of demand charges. The cost of operating a 100âwatt light during the 15âminute peak demand interval is $0.74.