Pronunciation: /ˈluːmən/
noun the SI unit of luminous flux, equal to the amount of light emitted per second in a unit solid angle of one steradian from a uniform source of one candela
A1 A lumen is a unit of measurement for the brightness of light.
A2 The flashlight had a lumen rating of 500, making it very bright.
B1 The lumen output of the new LED light bulbs is much higher than traditional incandescent bulbs.
B2 To properly illuminate the room, you need to calculate the total lumens needed for all the light fixtures.
C1 The lumen maintenance of the streetlights is being closely monitored to ensure proper lighting levels are maintained.
C2 The lumen efficacy of the new stadium lighting system is unmatched, providing optimal visibility for both players and spectators.
formal The lumen is the SI unit of luminous flux, measuring the total quantity of visible light emitted by a source.
informal Make sure to choose a light bulb with high lumens for better brightness in your room.
slang I can't see anything in this room, we need more lumens up in here!
figurative Her smile lit up the room, filling it with a lumen of joy.
luminated
lumens
more luminous
most luminous
illuminate
will illuminate
has illuminated
is illuminating
lumen
luminous
to illuminate
illuminating
illuminated