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LED Lumens To Watts Conversion Chart

Lumens are the new unit of measurement for light bulbs

For decades, we’ve been buying light bulbs according to wattage. But as low-wattage, energy efficient light bulbs like CFLs and LEDs become easily available at an affordable price, buying bulbs based on watts has become less prevalent.

Instead of focusing on wattage, which measures power or energy use, many manufacturers are now labelling their energy efficient bulbs according to lumens, which measure light output. 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.

Converting Lumens to Watts

Measuring and labelling light output instead of energy use makes it easier for you to find the right energy efficient bulb for your space. Use this chart to determine how many lumens you’ll need from your next light bulb. 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.

Shop for the right light bulb for your space by clicking on the equivalent wattage in the chart below.









25 W40 W60 W75 W100 W


18 W28 W42 W53 W70 W


6 W9 W12 W15 W20 W


4 W6 W10 W13 W18 W

For More Information

The above graph shows simple comparisons of basic watts to lumens in general. Click the wattage values to shop for bulbs. For more detailed information about specific comparisons, call us on: 01869 362222, email or for instant expert advice use our “Live Support Online” facility.

Sarah is a long-time employee of the Lightbulb Company, with a background in hospitality and a keen awareness of the important role lighting plays in our everyday lives. She has worn many hats at our company over the years, developing an extensive knowledge of lighting and the lighting industry. She is passionate about working with customers, understanding their needs, and providing them with the best possible solutions.

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