How many mystery writers does it take to replace an inefficient light bulb with an energy-efficient one?
Two: One to screw it in almost all the way, then a second to give it a good twist at the end.
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Federal tax credits are available for home energy efficiency improvements, including windows, doors, water heaters, and HVAC equipment for existing homes. For details, visit energystar.gov/taxcredits.
Source: Energy Star