“Incandescent bulbs use more energy and produce more heat due to their engineering designs,” says Paul Foote, energy efficiency and conservation specialist at the University of Illinois at Urbana-Champaign. It’s important to shift to more energy-efficient alternatives to reduce the environmental impacts of incandescent bulbs from the utilization of fossil fuels for electricity, he added.

By mandating a minimum light output or lumens per watt, manufacturers make sure all bulbs can effectively light up a room, which ensures that consumers will avoid overusing energy with substandard bulbs to get the same level of brightness, says Foote. “When upgrading from incandescent bulbs to LEDs, we have noticed a 60 percent decrease in energy consumption on average, and therefore energy cost avoidance has reduced our utility bill by similar amounts for lighting,” he adds.

Popular Science interviewed Paul Foote at F&S as part of their article about the importance of lighting retrofits. the full article is available online at https://www.popsci.com/environment/light-bulbs-sustainability-energy/.