# lumen vs Lyman

> English confusable word pair

## The two words

### lumen
*noun · IPA /ˈluːmən/ · frequency rank #25,829*
In the International System of Units, the derived unit of luminous flux; the light that is emitted in a solid angle of one steradian from a source of one candela. Symbol: lm.

### Lyman
*name · IPA /ˈlaɪ.mən/ · frequency rank #25,832*
A surname.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/vs/lumen-vs-lyman