What is Lumens?
Lumens (brightness)
Actual light output.
Short answer
Compare lumens across brands, since 9W bulbs range from 800 to 1,100 lumens.
Lumens when buying a led bulbs & lighting
Actual light output.
Why it matters: A bedroom needs ~1,500–2,500 lumens total; a kitchen counter needs far more.
Look for: Compare lumens across brands, since 9W bulbs range from 800 to 1,100 lumens.
Full LED Bulbs & Lighting buying guide