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.