User manual

01/ 2007 BENNING LUXMETER
25
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5. Standard illumination values
Type of
visual task
Practical examples
Normal illumina-
tion (lighting
intensity) in lux
Orientation Traffic zones, subordinate rooms 20
Filled storage rooms, hallways
in buildings for persons
50
Easy visual
tasks
Production plants with occasional
activities, toilet facilities, engine
rooms, traffic ways for vehicles
in buildings, staircases, con-
veyor belts, medical rooms
100
Crude works, continuously occu-
pied working places in produc-
tion plants, storage rooms with
reading tasks, canteens
200
Normal
visual tasks
Conference rooms, gymnasiums 300
Offices, medical facilities (urgenices) 500
Technical drawing rooms 750
Difficult
visual tasks
Supervision places, techni-
cal drawings, open plan offices,
assembly rooms, testing stations
1000
Very difficult
visual tasks
Assembly rooms for small com-
ponents, show windows
1500
Table 3: Standard values of inside working environment due to the
DIN 5035 standard
The nominal values listed above are reference values. Generally they refer to
horizontally working surfaces at a height of 0.85 m above floor and a mean
ageing condition of the lighting.
Condition Illuminance (lux)
Bright sun 50.000 - 100.000
Hazy day 25.000 - 50.000
Cloudy bright 10.000 - 25.000
Cloudy dull 2.000 - 10.000
Very dull 100 - 2.000
Sunset 1 – 100
Good street lighting 20
Poor street lighting 0,1
Full moon 0,01 - 0,1
Starlight 0,001 - 0,001
Overcast night 0,00001 - 0,0001
Table 4: Typical Illuminance levels at outdoor places