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.
So the Total Cost of Ownership for a 65W incandescent light bulb is $166.50 for producing 25,000 hours of light. What is the Total Cost of Ownership for a 12W (65W equivalent) LED light bulb? The LED light bulb itself costs about $30 up front. It uses 12W of electricity, which adds up to 300kWh over 25,000 hours.