Physical Light
Cheat sheet

Illuminance

Source

120,000 lux

Brightest sunlight

111,000 lux

Bright sunlight

20,000 lux

Shade illuminated by entire clear blue sky, midday

1,000 - 2,000 lux

Typical overcast day, midday

<200 lux

Extreme of thickest storm clouds, midday

400 lux

Sunrise or sunset on a clear day (ambient illumination)

40 lux

Fully overcast, sunset/sunrise

<1 lux

Illuminance

Source

<1 lux

Moonlight, clear night sky

0.25 lux

A full moon, clear night sky

0.01 lux

A quarter moon, clear night sky

0.002 lux

Starlight, clear moonless night sky

Luminous flux (lumen)

Source

12.57 lumen

Candle light.

< 100 lumen

Small decorative light, such as a small LED lamp.

200 - 300 lumen

Decorative lamp, such as a lamp that does not provide the main lighting for a bright room.

400 - 800 lumen

Ceiling lamp for a regular room.

800 - 1 200 lumen

Ceiling lamp for a large brightly lit room.

1 000 - 40 000 lumen

Bright street light.

Illuminance (lux)

Room type

150 - 300 lux

Bedroom.

300 - 500 lux

Classroom.

300 - 750 lux

Kitchen.

300 - 500 lux

Kitchen Counter or Office.

100 - 300 lux

Bathroom.

750 - 1 000 lux

Supermarket.

30 lux

City street at night.