Appendix A - Typical Light Levels; Appendix B - Common Terms And Conversion Factors - Extech Instruments 401025 User Manual

Appendix A - Typical Light Levels

Lux
20-75
75-150
150-300
300-750
750-1,500 75-150
1,500-
3,000
75-100
100-200
200-750
750-1,500 75-150
1,500-
2,000
75-150
150-200
200-300
300-500
500-750
750-1,500 75-150
1,500-
3,000

Appendix B - Common Terms and Conversion Factors

Illuminance (Visible Flux Density)
Luminance (Visible Flux Density per Solid Angle)
Luminous Intensity (Visible Flux per Solid Angle)
Luminous Flux ( Visible Flux)
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Foot
Candles
Factories
2-7 Emergency Stairs,
Warehouse
7-15 Exit/Entrance Passages
15-30 Packing Work
30-75 Visual Work: Production
Line
Typesetting: Inspection
Work
150-300 Electronic Assembly,
Drafting
Office
7-10 Indoor Emergency Stairs
10-20 Corridor Stairs
20-75 Conference, Reception
Room
Clerical Work
150-2000 Typing, Drafting
Store
7-15 Indoors
15-20 Corridor/Stairs
20-30 Reception
30-50 Display Stand
50-75 Elevator
Show Window, Packing
Table
150-300 Storefront, Show Window
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Lux Foot
Candles
Home
100-150 10-15 Washing
150-200 15-20 Recreational
Activities
200-300 20-30 Drawing Room,
Table
300-500 30-50 Makeup
500-1,500 50-150 Reading, Study
1,000- 100-200 Sewing
2,000
Restaurant
75-150 7-15 Corridor Stairs
150-300 15-30 Entrance, Wash
Room
300-750 30-75 Cooking/Dining
Room
750-1,500 75-150 Show Window
Hospital
30-75 3-7 Emergency Stairs
75-100 7-10 Stairs
100-150 10-15 Sick Room,
Warehouse
150-200 15-20 Waiting Room
200-750 20-75 Medical Exam Room
750-1,500 75-150 Operating Room
5,000- 500-1000 Eye Inspection
10,000
1 lm/m 2 = 1 lux (lx)
10 -4 lm/cm 2
10 -4 phot (ph)
9.290 x 10 -2 lm/ft 2
9.290 x 10 -2 foot-candles
1 lm/m 2 /sr = 1 candela/m 2
1 lm/sr = 1 candella
1 lumen (lm) = 1.464 x 10 -3 watts @ 555 nm
7 401025-en-GB_v2.9 5/18
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