4 401020 and 401021 Ver. 1.03 11/99
TYPICAL LIGHT LEVELS
Lux
Foot
Candles
Lux
Foot
Candles
Factories
Home
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
Office
Restaurant
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 Room, Dining
Table
750-1,500 75-150 Clerical
Work
750-1,500 75-150 Show
Window
1,500-2,000 150-2000 Typing,
Drafting
Store
Hospital
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
COMMON CONVERSION FACTORS
1 lux (lx)
10-4 lm/cm2
10-4 phot (ph)
9.290 x 10-2 lm/ft2
Illuminance (Visible Flux Density)
1 lm/m2 =
9.290 x 10-2 foot-candles
Luminance (Visible Flux Density per Solid Angle)
1 lm/m2/sr = 1 candela/m2
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
Copyright
©
1999 Extech Instruments Corporation. All rights reserved
including the right of reproduction in whole or in part in any form.
