U.S. bans sale of most incandescent light bulbs in push for energy efficiency

Incandescent bulbs banned except for certain specialty types; manufacturers, retailers face penalties
LED bulbs mandated as more energy-efficient alternative that will save consumers money
Lightbulb efficiency standards first passed in 2007 under Bush; stalled under Trump, reinstated by Biden
Projected to reduce carbon emissions by 222 million metric tons and save consumers $3 billion annually
Critics argue consumer choice limited; proponents say long-term cost savings and environmental benefits