Lumen
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Switch R to lm
Lumen Unit Table
A list of units symbol and data.
From lmTo RAll conversion
1 lm1 R
2 lm2 R
3 lm3 R
4 lm4 R
5 lm5 R
6 lm6 R
7 lm7 R
8 lm8 R
9 lm9 R
10 lm10 R
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.

Rayleigh (R): Specialized Unit for Atmospheric Light Emissions

The rayleigh is a non-SI unit used to measure the faint emissions of light in the upper atmosphere, such as those produced by auroras or airglow. One rayleigh corresponds to 1010 photons per square meter per second along a vertical column. This unit is especially important in geophysics, atmospheric science, and astrophysics for quantifying extremely low levels of light that are invisible to the human eye but detectable by scientific instruments.

Rayleigh measurements are essential for studying natural light phenomena in the Earth's mesosphere and thermosphere. These emissions play a crucial role in understanding the impact of solar activity on Earth, helping scientists monitor space weather and its effects on satellite communications and navigation systems. By quantifying these subtle luminous occurrences, the rayleigh contributes to our broader understanding of planetary atmospheres and cosmic interactions.

Complete list of conversion for Lumen
Lumen (lm)

1 Lumen = 1 Candela

Convert 2 lm → cd

1 Lumen = 1 Candlepower

Convert 2 lm → cp

1 Lumen = 1 Lux

Convert 2 lm → lx

1 Lumen = 0.09290312990644656 Footcandle

Convert 2 lm → fc

1 Lumen = 0.0001 Phot

Convert 2 lm → ph

1 Lumen = 1 Candela per square meter

Convert 2 lm → cd/m²

1 Lumen = 1 Nit

Convert 2 lm → nt

1 Lumen = 0.0001 Stilb

Convert 2 lm → sb

1 Lumen = 0.0003141592653587727 Lambert

Convert 2 lm → L

1 Lumen = 0.2918635079290997 Footlambert

Convert 2 lm → fL

1 Lumen = 1 Lumen second

Convert 2 lm → lm·s

1 Lumen = 1 Lux second

Convert 2 lm → lx·s

1 Lumen = 1 Rayleigh

Convert 2 lm → R