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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