the.com/lumen
the unit measuring how loud a light source shouts into the dark.
means A lumen is the SI unit of luminous flux, measuring the total amount of visible light a source emits in all directions.
from Straight from Latin 'lumen,' meaning 'light' or 'an opening that lets light in' — the same root behind 'luminous' and 'illuminate,' and a cousin of 'lux.' Anatomists borrowed it too, calling the hollow channel inside a tube or vessel a 'lumen,' as if light could pour through. Physics adopted the word as a formal unit in the late 19th to early 20th century, when scientists were busy putting numbers to brightness.
- name origin
- Latin for light, opening, or window
- sun's output
- roughly 36 octillion lumens, give or take
- candle baseline
- one candle emits about 12 lumens
- biology twist
- also means a hollow tube's interior, like blood vessels
- watt divorce
- lumens measure brightness, watts only measure power drawn
for instance
lumen magazine — defunct catholic magazine published from 1952-2012 in the united states