Extech Instruments LT300 User Manual page 7

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Appendix
Typical Light Levels
Lux Foot
Candles
Factories
20 75 2 7 Emergency Stairs, Warehouse
75 150 7 15 Exit/Entrance Passages
150 300 15 30 Packing Work
300 750 30 75 Visual Work: Production Line
750 1,500 75 150 Typesetting: Inspection Work
1,500 3,000 150 300 Electronic Assembly, Drafting
75 100 7 10 Indoor Emergency Stairs
100 200 10 20 Corridor Stairs
200 750 20 75 Conference,
Reception Room
750 1,500 75 150 Clerical Work
1,500 2,000 150 2000 Typing, Drafting
75 150 7 15 Indoors
150 200 15 20 Corridor/Stairs
200 300 20 30 Reception
300 500 30 50 Display Stand
500 750 50 75 Elevator
750 1,500 75 150 Show Window,
Packing Table
1,500 3,000 150 300 Storefront, Show Window
Spectral Sensitivity
R
e
1
l
a
t
0.8
i
v
e
0.6
R
e
s
0.4
p
o
n
0.2
s
e
400 450
0
- - - - - Light Meter Response
www.
Lux
Candles
100 150
150 200
200 300
300 500
500 1,500
1,000 2,000 100 200
Office
75 150
150 300
300 750
750 1,500
Store
30 75
75 100
100 150
150 200
200 750
750 1,500
5,000 10,000 500 1000 Eye Inspection
500 550 600
Wavelength (nm)
_____
CIE Response
7
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Foot
Home
10 15 Washing
15 20 Recreational
Activities
20 30 Drawing Room,
Table
30 50 Makeup
50 150 Reading, Study
Sewing
Restaurant
7 15 Corridor Stairs
15 30 Entrance,
Wash Room
30 75 Cooking Room,
Dining Table
75 150 Show Window
Hospital
3 7 Emergency Stairs
7 10 Stairs
10 15 Sick Room,
Warehouse
15 20 Waiting Room
20 75 Medical Exam Room
75 150 Operating Room
650 700
LT300-EU-EN V2.3 2/13
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