401020 Datasheet, PDF (4/4 Pages) Extech Instruments Corporation. – Light Meter Adapters

TYPICAL LIGHT LEVELS
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
750-1,500 75-150 Typesetting: Inspection Work
1,500-3,000 150-300 Electronic Assembly, Drafting
Office
75-100
7-10 Indoor Emergency Stairs
100-200 10-20 Corridor Stairs
200-750 20-75 Conference, Reception Room
750-1,500 75-150 Clerical Work
1,500-2,000 150-2000 Typing, Drafting
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
750-1,500 75-150 Show Window, Packing Table
1,500-3,000 150-300 Storefront, Show Window
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
Foot
Candles
10-15
15-20
20-30
30-50
50-150
100-200
7-15
15-30
30-75
75-150
Home
Washing
Recreational Activities
Drawing Room, Table
Makeup
Reading, Study
Sewing
Restaurant
Corridor Stairs
Entrance, Wash Room
Cooking Room, Dining
Table
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
5,000-10,000 500-1000 Eye Inspection
COMMON CONVERSION FACTORS
Illuminance (Visible Flux Density)
Luminance (Visible Flux Density per Solid Angle)
Luminous Intensity (Visible Flux per Solid Angle)
Luminous Flux ( Visible Flux)
1 lm/m2 = ^{1 lux (lx)}
10-4 lm/cm2
10-4 phot (ph)
9.290 x 10-2 lm/ft2
9.290 x 10-2 foot-candles
1 lm/m2/sr = 1 candela/m2
1 lm/sr = 1 candella
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.
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401020 and 401021 Ver. 1.03 11/99