What is banned? The rule passed by President Joe Biden's Department of Energy in April 2022 states that light bulbs must emit a minimum of 45 lumens per watt. A lumen is a measure of brightness.

The Kelvin measure is one of a bunch of (very confusing) numbers found on the side of bulb packaging. Most people, when buying a light bulb, will look at lumens and wattage.

Wondering if you can use a regular light bulb in a 3-way socket? Learn what happens, if it’s safe, and how it affects brightness settings.