The U.S. Department of Energy announced that the incandescent light bulb is officially dead, and producers and sellers must begin phasing them out before a widespread ban on July 2023.

The new standards say a lightbulb can only have a minimum energy efficiency of 45 lumens per watt. For reference, an average incandescent bulb has an efficiency of 15 lumens per watt while a halogen bulb has an efficiency of 25 lumens per watt. Light bulbs that do not meet this standard have 75 days to be phased out of production as part of the “enforcement leniency period,” as described in the Department of Energy’s Enforcement Policy Statement before widespread enforcement begins in July of next year. The Policy, which was released today, reads:

"DOE intends to pursue violations by distributors and retailers using the same enforcement transition stages along with its discretion. However, the timeline for these entities is more gradual to allow first for the transition of existing inventory, while manufacturers, including importers, transition their production and shipments in 2022."
https://www.energy.gov/sites/default/files/2022-04/GSL_EnforcementPolicy_4_25_22.pdf