Brightness is measured
in lumens

LED and CFL bulbs measure a bulb's brightness in lumens, not watts.

40 watt bulb =Standard incandescent
40W 60W 75W 100W
Lumen calculator slider

Select a wattage to view its lumen equivalent

What to Look for on the Package

To help consumers better understand the switch from watts to lumens, many packages include a product label for light bulbs. It helps you buy the light bulbs that are right for you.

Lighting Fact Label

Like the nutrition label on food products, the Lighting Facts label helps you understand what you are really purchasing. The label clearly provides the lumens -- or brightness -- of the bulb as well as the estimated operating cost for the year, and the colour of the light (from warm/yellowish, to white to cool/blue).

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