401025-en-GB_v2.9 5/18
Appendix A - Typical Light Levels
Lux Foot
Candles
Lux Foot
Candles
20-75 2-7 Emergency Stairs,
Warehouse
100-150 10-15 Washing
75-150 7-15 Exit/Entrance Passages 150-200 15-20 Recreational
Activities
150-300 15-30 Packing Work 200-300 20-30 Drawing Room,
Table
300-750 30-75 Visual Work: Production
Line
300-500 30-50 Makeup
750-1,500 75-150 Typesetting: Inspection
Work
500-1,500 50-150 Reading, Study
1,500-
3,000
150-300 Electronic Assembly,
Drafting
1,000-
2,000
100-200 Sewing
75-100 7-10 Indoor Emergency Stairs 75-150 7-15 Corridor Stairs
100-200 10-20 Corridor Stairs 150-300 15-30 Entrance, Wash
Room
200-750 20-75 Conference, Reception
Room
300-750 30-75 Cooking/Dining
Room
750-1,500 75-150 Clerical Work 750-1,500 75-150 Show Window
1,500-
2,000
150-2000 Typing, Drafting
75-150 7-15 Indoors 30-75 3-7 Emergency Stairs
150-200 15-20 Corridor/Stairs 75-100 7-10 Stairs
200-300 20-30 Reception 100-150 10-15 Sick Room,
Warehouse
300-500 30-50 Display Stand 150-200 15-20 Waiting Room
500-750 50-75 Elevator 200-750 20-75 Medical Exam Room
750-1,500 75-150 Show Window, Packing
Table
750-1,500 75-150 Operating Room
1,500-
3,000
150-300 Storefront, Show Window 5,000-
10,000
500-1000 Eye Inspection
Appendix B - Common Terms and Conversion Factors
Illuminance (Visible Flux Density)
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
Luminance (Visible Flux Density per Solid Angle)
1 lm/m
2
/sr = 1 candela/m
2
Luminous Intensity (Visible Flux per Solid Angle) 1 lm/sr = 1 candella
Luminous Flux ( Visible Flux) 1 lumen (lm) =
1.464 x 10
-3
watts @ 555 nm
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