Yes that is true, however manufacturers use wattage as something the general public recognizes and associates with brightness. Go look at all the bulbs made for homes and all you'll see is wattage and not lumens. Even the florescent bulbs are shown with their wattage and the equivalent incandescent bulb so people know which ones will be 'bright' enough for what they need. This is done to keep from confusing the non-electrical people in the public. You will find lights labeled in lumen in the form of flashlights and such, but that is from different manufacturers who are selling to a customer base who would better understand what that meant. And yes I come from an electronic background lol.
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