watts chart below to shop for the right light bulb for your space. Lumen is the term used to describe the total amount of light emitted by a light source, while wattage merely indicates the amount of energy it uses. For example, if you typically purchase 60W incandescent bulbs, which produce about 700-800 lumens, consider purchasing a lower energy alternative like a 42W halogen bulb, 12W CFL, or even a 10W LED bulb to achieve the same brightness.Ĭlick the equivalent wattage in the lumens vs. Use this chart to determine how many lumens you’ll need from your next light bulb. With energy-efficient lighting like LEDs and CFLs, how many lumens are in a 60W bulb or 100W bulb depends on the lumen output of the bulb, not its energy use.ĭon’t despair! Measuring and labelling light output instead of energy use actually makes it easier for you to find the right energy-efficient bulb for your space. How many lumens are in a watt? Because lumens measure brightness and watts measure energy output, there is no simple method for converting wattage to lumens. Lumens to watts calculation formula Energy saving lamps have high luminous efficacy (more lumens per watt). So while we may be accustomed to shopping for bulbs according to wattage, lumens are actually a more accurate measurement of how bright your light will be. Instead of focusing on wattage, which measures power or energy use, manufacturers are indicating the brightness of their energy-efficient bulbs according to lumens, which measure light output. But as energy-efficient, low-watt light bulbs like CFLs and LEDs have become readily available, watts have become an unreliable metric for selecting bulbs. Lumens are the new unit of measurement for light bulbsįor decades, we’ve been buying light bulbs according to wattage.
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