As the U.S. phases out incandescent light bulbs, we look back at the light of our lives, and look forward to new generations of CFLs and LEDs. We started bidding goodbye to Edison’s classic in 2012. Congress directed the Department of Energy (DOE) to develop revised standards to take effect in 2020, including a backstop requiring that light bulbs achieve at least 45 lumens (a measure of brightness) per watt. DOE recently stated that this backstop will go into effect. Halogen incandescent light bulbs will p... read more