U.S. Department of Energy - Energy Efficiency and Renewable Energy
Energy 101: Lumens (Video)
Lumens are the new way to shop for light. For decades, we have been buying light bulbs based on how much energy they consume in watts, no matter how much light they provide. Today's energy-saving light bulbs use up to eighty percent less power to give you the same amount of light—so wouldn't it make more sense to buy light bulbs based on how much light they provide? This edition of Energy 101 reveals how lumens, which measure brightness, can help you choose the right light bulb for the amount of light you want. Featured is the new Lighting Facts label, which was created by the Federal Trade Commission to help consumers better understand the switch from watts to lumens.
For more information on lumens and lighting choices from the Office of Energy Efficiency and Renewable Energy, visit the Energy Savers website.