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Illuminance Levels and Guidelines
Illuminance/Lu
Level
Environment Description
x
Level 0
0-5
No light or minimal street light, twilight.
Level 1
6-50
Cloudy indoor.
Level 2
51-100
Family living room, hallways.
Level 3
101-500
Offices, show rooms, study library, laboratories.
Supermarkets, drawing work, detailed mechanical
Level 4
501-2000
workshops, operation theater.
Level 5
>2000
Performance of very prolonged and exacting visual tasks.
-END-
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