McGowan says incandescents top out at around 1000 hours, compared to the 6,000-15,000 hours of CFLs ... require light bulbs sold in the U.S. to produce 45 lumens per watt. McGowan expects that ...

There's no need to hoard bulbs. Our tests found that new LEDs and CFLs are light-years ahead of earlier versions. Standard 60- and 40-watt bulbs are the last to be phased out, though remaining ...