Lumen
Enter a value and select units to convert.
Lumen Unit Table
A list of units symbol and data.
From lmTo fcAll conversion
1 lm0.09290312990644656 fc
2 lm0.18580625981289312 fc
3 lm0.2787093897193397 fc
4 lm0.37161251962578623 fc
5 lm0.46451564953223273 fc
6 lm0.5574187794386793 fc
7 lm0.6503219093451259 fc
8 lm0.7432250392515725 fc
9 lm0.836128169158019 fc
10 lm0.9290312990644655 fc
Description

Lumen (lm): Measuring Luminous Flux

The lumen is the SI unit of luminous flux, quantifying the total amount of visible light emitted by a source per unit of time. One lumen is defined as the luminous flux emitted within a unit solid angle (one steradian) by a point source with a uniform luminous intensity of one candela. This unit is crucial for evaluating the overall brightness of light sources, such as bulbs and LEDs.

In practical terms, lumens provide a direct measure of a light source's output, enabling consumers and professionals to assess and compare the brightness of different lighting products. Higher lumen values indicate greater light output, which is essential for applications requiring specific illumination levels, from residential lighting to commercial and industrial settings.

Footcandle (fc): Imperial Unit of Illuminance

The footcandle is a non-SI unit of illuminance used primarily in the United States. It is defined as the illuminance on a one-square-foot surface from a uniform source of light equivalent to one lumen. One footcandle equals approximately 10.764 lux. Despite the global shift towards SI units, the footcandle remains prevalent in certain industries and applications.

Understanding footcandles is important for professionals working in lighting design, architecture, and photography within regions that use imperial measurements. It allows for the assessment and specification of lighting requirements, ensuring that spaces are adequately illuminated according to established standards and practices.

Complete list of conversion for Lumen
Lumen (lm)

1 Lumen = 1 Candela

Convert 2 lmcd

1 Lumen = 1 Candlepower

Convert 2 lmcp

1 Lumen = 1 Lux

Convert 2 lmlx

1 Lumen = 0.09290312990644656 Footcandle

Convert 2 lmfc

1 Lumen = 0.0001 Phot

Convert 2 lmph

1 Lumen = 1 Candela per square meter

Convert 2 lmcd/m²

1 Lumen = 1 Nit

Convert 2 lmnt

1 Lumen = 0.0001 Stilb

Convert 2 lmsb

1 Lumen = 0.0003141592653587727 Lambert

Convert 2 lmL

1 Lumen = 0.2918635079290997 Footlambert

Convert 2 lmfL

1 Lumen = 1 Lumen second

Convert 2 lmlm·s

1 Lumen = 1 Lux second

Convert 2 lmlx·s

1 Lumen = 1 Rayleigh

Convert 2 lmR