If every household in America changed just one traditional light bulb to a energy-efficient compact fluorescent bulb at home, combined efforts would save 5.6 billion kilowatt-hours of electricity per year or $526 million a year in electric expenses. This would save enough energy to light more than 2.5 million homes for a year and prevent greenhouse gases equivalent to the emissions of nearly 800,000 cars. CFL light bulbs use 2/3 less energy than standard incandescent light bulbs and last up to ten times longer. Replacing a 60-watt incandescent with a 13-watt CFL can save consumers at least $30 in energy...