USATODAY.com - The congressionally mandated efficiency standards gradually phase out Thomas Edison's 131-year-old creation in favor of other light bulbs that use at least 25% less energy. The first to go, beginning Sunday, is the traditional 100-watt, followed in January 2013 with the 75-watt version and in January 2014 with the 40-watt and 60-watt bulbs.
Yet even Edison's 100-watt bulb will still be available for a while. The bipartisan law mandating the phaseout, whichPresident George W. Bush signed in 2007, says the bulbs can't be manufactured or imported after Jan. 1 but lets stores sell them until stock runs out.
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