Extech Instruments 401025 User Manual page 5

Frequency Spectrum
1
0.8
0.6
0.4
0.2
300 400
Wavelength
Appendix A - Typical Light Levels
Lux Foot
Candles
20-75 2-7
75-150 7-15
150-300 15-30
300-750 30-75
750-1,500 75-150
1,500- 150-300
3,000
75-100 7-10
100-200 10-20
200-750 20-75
750-1,500 75-150
1,500- 150-2000
2,000
75-150 7-15
150-200 15-20
200-300 20-30
300-500 30-50
500-750 50-75
750-1,500 75-150
1,500- 150-300
3,000
500 600
Factories
Emergency Stairs,
Warehouse
Exit/Entrance Passages
Packing Work
Visual Work: Production
Line
Typesetting: Inspection
Work
Electronic Assembly,
Drafting
Office
Indoor Emergency Stairs
Corridor Stairs
Conference, Reception
Room
Clerical Work
Typing, Drafting
Store
Indoors
Corridor/Stairs
Reception
Display Stand
Elevator
Show Window, Packing
Table
Storefront, Show Window
700
Lux
100-150
150-200
200-300
300-500
500-1,500
1,000-
2,000
75-150
150-300
300-750
750-1,500
30-75
75-100
100-150
150-200
200-750
750-1,500
5,000-
10,000
5
Foot
Candles
Home
10-15 Washing
15-20 Recreational
Activities
20-30 Drawing Room,
Table
30-50 Makeup
50-150 Reading, Study
100-200 Sewing
Restaurant
7-15 Corridor Stairs
15-30 Entrance, Washroom
30-75 Cooking/Dining
Room
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
500-1000 Eye Inspection
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