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

Appendix A: Typical Light Levels

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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- 75-150 Typesetting:
1,500 Inspection Work
1,500- 150-300 Electronic Assembly,
3,000 Drafting
Office
75-100 7-10 Indoor Emergency
Stairs
100-200 10-20 Corridor Stairs
200-750 20-75 Conference,
Reception Room
750- 75-150 Clerical Work
1,500
1,500- 150-2000 Typing, Drafting
2,000
Store
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- 75-150 Show Window,
1,500 Packing Table
1,500- 150-300 Storefront, Show
3,000 Window

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)
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
6 401025 Ver. 2.1 07/05