Daylight - Daylight Intensity in Different Conditions

Daylight Intensity in Different Conditions

Illuminance Example
120,000 lux Brightest sunlight
110,000 lux Bright sunlight
20,000 lux Shade illuminated by entire clear blue sky, midday
10,000 - 25,000 lux Typical overcast day, midday
<200 lux Extreme of darkest storm clouds, midday
400 lux Sunrise or sunset on a clear day (ambient illumination).
40 lux Fully overcast, sunset/sunrise
<1 lux Extreme of darkest storm clouds, sunset/rise

For comparison, nighttime illuminance levels are:

Illuminance Example
<1 lux Moonlight
0.25 lux Full Moon on a clear night
0.01 lux Quarter Moon
0.002 lux Starlight clear moonless night sky including airglow
0.0002 lux Starlight clear moonless night sky excluding airglow
0.00014 lux Venus at brightest
0.0001 lux Starlight overcast moonless night sky

For a table of approximate daylight intensity in the Solar System, see sunlight.

Read more about this topic:  Daylight

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