The Associated Press -"Under existing rules, new bulbs will have to be 25 to 30 percent more efficient than traditional incandescent models. As of Jan. 1, 2012, inefficient 100-watt bulbs will no longer be available at most stores. Also on the way out are traditional 75-watt bulbs in 2013 and 40-watt and 60-watt versions in 2014.
The National Resources Defense Council said that when the law is fully implemented in 2020, energy costs will be reduced by 7 percent or about $85 a household every year. It said the more efficient bulbs will eliminate the need for 33 large power plants."