There is a large display at my workplace that is illuminated eight hours every workday by two 25-watt incandescent bulbs. This week, I found comparable compact fluorescent bulbs and made the switch. Each of the new bulbs consumes only 13 watts while providing a much brighter output. Our calculations then are:
25 watts ÷ 1,000 x 8 hours x 2 bulbs x 260 days = 104 Total kWh/year
13 watts ÷ 1,000 x 8 hours x 2 bulbs x 260 days = 54 Total kWh/year
Our one little change has saved us 50 kWh over the course of one full year. That's a savings of about 37 kWh for the remaining year. Quite frankly, I think that might be enough hard work for a while...
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