Lumen (abbreviation: lm) is the unit for luminous flux and indicates the brightness of a lamp; the higher the lumen value, the brighter the lamp.
To compare the brightness of an LED lamp with a conventional incandescent lamp, you can use the following scale. For example, if you want to compare an LED lamp with 2,500 lumens (lm) to the brightness of an incandescent lamp, find the corresponding lumen rating or the closest value on the scale, in this case, for example, 2,452 lm. At the top of the scale you will now find the wattage specification of an approximately comparable incandescent lamp, in this case 150W. So you can compare the brightness of the LED lamp with 2,500lm approximately with a 150W incandescent lamp.