iesna lighting levels

I. INTERIOR Very Important Important Somewhat importantLOCATIONS AND TASKS

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(see Transportation Terminals in Section V, Transportation)

Armories

Auditoriums

Assembly Social activity

Lobby General Writing area Tellers' stations ATM facilities — keypad ATM facilities — display screen ATM facilities — writing surface ATM facilities — surrounding area

Barber Shops/Salons

Casino and Gaming

Circulation High activity Medium activity Low activity Baccarat General Game surface

Accounting (see Offices)

Air Terminals

Art Galleries (see Museums)

Banks (see Reading)

Bingo General Game surface Blackjack General Game surface Craps General Game surface Keno General Game surface Poker General Game surface Roulette General Game surface Sport and race books General Game surface Video and slots

Churches and Synagogues

(see Houses of Worship section)

Club and Lodge Rooms

Lounge and reading

Conference Rooms

Meeting Critical seeing (refer to task) Video conference


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Correctional Facilities Cells Day rooms

Seating area (spectators)

Judge and clerk Litigant's table Podium Witness chair

Dance Halls/Discotheques

Ballrooms/social events

(see Transportation Terminals in Section V, Transportation)

Drafting/Graphic Arts

CAD stations only Mixed CAD and paper task Mylar High contrast media

Low contrast media

Vellum/mylar

High contrast Low contrast Overlays Light table Prints

Educational Facilities

Corridors

Corridors (see Service Spaces)

Court Rooms (see Reading)

Dance halls/discotheques

Depots, Terminals, Stations

Classrooms General (see Reading) Art rooms Drafting (see Drafting/Graphic Arts) Home economics (see Residences) Science laboratories Lecture halls Audience (see Reading) Demonstration Music rooms (see Reading) Shops (see Section II, Industrial) Sight saving rooms Study halls (see Reading) Typing (see Reading)

Gymnasiums

Basketball

Other sports (See Section IV, Sports)

Social events

Outdoor sports facilities (see Section IV, Sports) Cafeterias (see Food Service Facilities) Dormitories (see Residences)

Elevators, Freight

Elevators, Passenger

Emergency Lighting

(see Section VI, Emergency, Safety, and Security)

Exhibition Halls


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Filing (see Offices and Reading)

Food Service Facilities

(If equipment locations are known, see Residences-Kitchens)

Butcher shop Cashier Cleaning Dining Food displays Food storage Nonrefrigerated Refrigerated Galley Kitchen Pantry Refuse area Sculleries Thaw room

Food Courts

Service Station in Section III, Outdoor)

Graphic Design and Material

Color selection Charting and mapping Graphs Keylining Layout and artwork Photographs, moderate detail

Health Care Facilities

Ambulance (local) Anesthetizing Autopsy and morgue Autopsy, general Autopsy table Morgue, general Cardiac function laboratory Central sterile supply Inspection, general Inspection

Financial Facilities (see Banks)

Fire Stations (see Municipal Buildings - Police and Fire)

Garages — Parking (see Outdoor Facilities section)

Gasoline Stations (see Retail Spaces - Outdoor:

Work areas, general Processed storage Corridors Nursing areas, day Nursing areas, night Operating areas, delivery, recovery, and laboratory suite and service Critical care areas General Examination Surgical task lighting Handwashing Cystoscopy room Dental suite General Instrument tray Oral cavityI. INTERIOR Very Important Important Somewhat importantLOCATIONS AND TASKS

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Recovery room General Dialysis unit, medical Elevators EKG and specimen room General Emergency outpatient General Endoscopy rooms General Peritoneoscopy Culdoscopy Eye surgery

Fracture room General

Local Inhalation therapy Laboratories Specimen collecting Linens Sorting soiled linen Central (clean) linen room Sewing room, general Linen closet Lobby Locker rooms Medical illustration studio Medical records Nurseries General Observation and treatment Nursing stations General Desk Corridors, day Corridors, night Medication station Obstetric delivery suite Labor rooms General Local Birthing room Delivery area Scrub, general General Delivery table Resuscitation Postdelivery recovery area Occupational therapy Work areas, general Work tables or benches Patient rooms General Observation Critical examination Reading Toilets Physical therapy departments Gymnasiums Tank rooms Treatment cubicles Postanesthetic recovery room General

Local Pulmonary function laboratories Radiological suite General Radiography/fluoroscopy roomI. INTERIOR Very Important Important Somewhat importantLOCATIONS AND TASKS

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Radiation therapy section General Solarium General

Local for reading Stairways Surgical suite Operating room, general

Operating table Scrub room

Instruments and sterile supply room

Clean-up room, instruments Anesthesia storage Substerilizing room Surgical induction room Surgical holding area Toilets Utility room Waiting areas General Local for reading

(see Hotels, Food Service Facilities)

Homes (see Residences)

Hospitality Facilities

Hotels

Guest rooms

General

Bathrooms, for grooming Reading/desk work

Corridors, elevators, stairs

Front desk Linen room Sewing General Lobby General lighting Reading and work areas Entrance canopy

Congregational areas

Leadership area

Highlighted items

Reading stacks

Bookstacks

Active

Inactive

Book repair or binding

Cataloguing

Card files (paper)

Carrels, individual study desks

Circulation desk

Map and print room (see Graphic Design and Material)

Audiovisual areas

Audio listening areas

Microform areas


Hospitals (see Health Care Facilities)

Houses of Worship

Kitchens (see Food Service or Residences)

Libraries (10)

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Locker Rooms

Merchandising Spaces

Retail store areas Alteration room Fitting room Dressing areas Fitting areas Locker rooms Stock rooms, wrapping

and packaging

Sales transaction area

Circulation

General merchandise display

Feature display Show windows Shopping mall areas Main concourse Food court (see Food Courts) Entertainment areas Kiosks Directory/information desk

Service corridors Restrooms Child care

Vertical transportation Entry/vestibule Side arcade Landscape (see Retail Spaces — Outdoor in Section III, Outdoor) Meeting rooms/officesSupermarkets Meat — processed

Meat — fresh

Dairy cases

Produce

Floral displays

Gondolas

Shelving

Municipal Buildings - Police and Fire

Police Identification records Jail cells and interrogation rooms

Fire Station

Museums

Flat displays on vertical surfaces

Exhibit cases 3-dimensional objects Realistic environments

Lobbies, general gallery areas, corridors Restoration or conservation shops and labs


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Filing (see Reading) General and private offices (see Reading) Open plan office Intensive VDT use Open plan office Intermittent VDT use Private office Libraries (see Libraries)

Motels (see Hotels)

Nursing Homes (see Health Care Facilities)

Offices (13)

Lobbies, lounges, and reception areas Mail sorting Copy rooms

Post Offices

Lobby Customer service counter Mail processing, general

Copied tasks Microfiche reader Photograph, moderate detail Thermal copy, poor

Photocopies

Data processing tasks VDT screens Impact printer good ribbon

ink jet/laser printer keyboard reading Machine rooms Active operations Tape storage Machine area Equipment service Thermal print Handwritten tasks #2 pencil and softer leads #3 pencil #4 pencil and harder leads Ball-point pen Felt-tip pen Handwritten carbon copy White boards Chalk boards Printed tasks 6-point type 8- and 10-point type Glossy magazines Maps Newsprint Typed originals

Parking Facilities (see Section III, Outdoor)

Reading (16)

Photocopies, 3rd generation

2nd carbon and greater

Telephone books

Residences

General lighting Conversation, relaxation, and entertainment

Passage areas (circulation)


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Specific visual tasks Dining

Grooming

Makeup and shaving

Dressing evaluation (mirror)

Handcrafts and hobbies

Ordinary tasks (e.g,. crafts) Difficult tasks (e.g., sewing)

Critical tasks (e.g., workbench) Easel hobbies Ironing Kitchen counter Critical seeing (e.g., cutting) General Kitchen range Difficult seeing (e.g., cooking)

Kitchen sink Difficult seeing Noncritical (clean up) Laundry

Music study (piano, organ)

Reading In a chair (casual)

In a chair (serious) In bed (casual)

At desk

Casual

Serious Sewing (see Residences: Handcrafts and Hobbies)

Table games

Service Spaces

(see Service Spaces in Section II, Industrial)

Stairways and corridors Elevators (see Elevators) Toilets and washrooms

Service Stations

Service bays (see Section II, Industrial) Sales room (see Merchandise Spaces)

Toilets and Washrooms

Transportation Terminals

(See Section V, Transportation)

Wine cellarI. INTERIOR Very Important Important Somewhat importantLOCATIONS AND TASKS

Restaurants (see Food Service Facilities)

Retail Spaces (see Merchandising Spaces)

Safety (see Section VI, Emergency, Safety, and Security)

Schools (see Educational Facilities)

Show Windows (see Merchandising Spaces)

Stairways (see Service Spaces)

Storage Rooms (see Section II, Industrial)

Stores (see Merchandising Spaces)

Theatre and Motion Picture Houses

Winery (see Food Service Facilities)

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Notes:

(1) Consider lighting for video cameras.(2) Maximum illuminance.(3) At ground level.(4) The minimum illuminance in a prison cell is 200 lx (20 fc); 300 lx (30 fc) should be provided for reading at the head of the bed.(5) Adjustable task lighting recommended.(6) Task lighting recommended, possibly located in ceiling.(7) Degradation factors important to consider.(8) In the display plane.(9) Special lighting for signage or banners may be required.(10) See Chapter for special considerations.(11) Refer to Chapter 16, Health Care Facility Lighting, for specific recommendations for surgical task lighting.(12) At 30" above floor.(13) Design issues, including illuminances, can be listed for room or space. Refer to specific task under "Reading" or "Graphic Design and Materials", for example.(14) Lighting should be flexible to accommodate changes in office furniture.(15) Accoustical aspects of luminaires need to be considered.(16) Design issues and illuminances listed for the task. See "Offices" or "Educational Facilities", for example, for additional considerations for the room.

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Ch. 11

Ch. 23

C A

Ch. 14

C B A

Ch. 11

(1) C A(1) D A(1) E A(1) A C(1) A B (2)

D AC A (3)

E D

Ch. 13

D BC AB A

D(1) C

D(1) C B

E A(1) C

D(1) C

C(1) C A

E(1) C

D(1) C

D A(1) C B

C A

Ch. 14

D

Ch. 11D B

(1) E D

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Ch. 14D B (4)D B

Ch. 14C A

(1) E C (5)(1) E C (6)(1) E C (5)(1) D B

A AB A

Ch. 23

C AD A

E CF D

E CF D

(7)C AE C

Ch. 12C

E D

E D

F E

F E

Ch. 20F D

B A

Ch. 20Ch. 13Ch. 18

B

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Ch. 29

C A


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Ch. 11

Ch. 11

Ch. 11

Ch. 13

E CD ACC AE (8)

B AB AE CE AD ACE CD A

(9) D A Ch. 13

Ch. 22

Ch. 17

F DF DE CF DF DE C

Ch. 16(10) E C(10) E C

(10) E C(10) G E(10) D B(10) E C

E CF D

D BD B

C AB A

E A

(10) B A(10) E C(10) (11)(10) F(10) E C

(10) D BE CG E


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C AF DB A

(10) A A

(10) E C

(10) E C(10) D B(10) D B(10) G E

(10) E C

(10) F D(10) D B

(10) E C

D AD A

(10) D BB A

(10) B AB A

(10) F D(10) E C

(10) B A(10) E C

(10) D B(10) E C

B AA A

(10) E C

C AE CF D

(10) F DG

(10) G E(10) G E

E C

(10) D B(10) E C

(10) B A(10) A A

E C(10) D B

D A

(10) D B(10) D B(10) D B

E C

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(10) B A

(10) C A(10) D B

C A

(10) G E(10) G E

F DD BE CC AC AE CE CC AD A

(10) C A(10) D B

Ch. 18

Ch. 13

Ch. 16

Ch. 13

CD BDBE

FC

CDA

Ch. 14C AD D

D

Ch. 13, 18

Ch. 12D

(7) D (12)

(7) B (12)

(7) D A (7) D

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C A Ch. 12, 20

Ch. 17

F D

D BF DC A

D BDCE CF DG E

D B

(9) E C(9) F D

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(4) The minimum illuminance in a prison cell is 200 lx (20 fc); 300 lx (30 fc) should be provided for reading at the head of the bed.

(11) Refer to Chapter 16, Health Care Facility Lighting, for specific recommendations for surgical task lighting.

(13) Design issues, including illuminances, can be listed for room or space. Refer to specific task under "Reading" or "Graphic Design and Materials", for example.

(16) Design issues and illuminances listed for the task. See "Offices" or "Educational Facilities", for example, for additional considerations for the room.

IES - RECOMMENDATIONS

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IES ILLUMINANCE CATEGORIES and VALUES - for GENERIC INDOOR ACTIVITIES

CATEGORY LUX FOOTCANDLES

A 20-30-50

B 50-75-100 5-7.5-10

C 100-150-200 10-15-20

D 200-300-500 20-30-50

E 500-750-1000 50-75-100

F 1000-1500-2000 100-150-200

G 2000-3000-5000 200-300-500

H 5000-7500-10000 500-750-1000

10000-15000-20000 1000-1500-2000

A-C for illuminances over a large area (ie lobby space)D-F for localized tasksG-I for extremely difficult visual tasks

IES METHOD - RECOMMENDED PROCEDURE

STEP 1 - define visual task and visual plane.

STEP 2 - select illuminance CATEGORY (use IES tables or Table 1 above)

Since 1958 the Illuminating Engineering Society has published illuminance recommendations in table form. These tables cover both generic tasks (reading, writing etc), and 100's of very specific tasks and activities (such as drafting, parking, milking cows, blowing glass and baking bread).

All tasks fall into 1 of 9 illuminance categories, covering from 20 to 20,000 lux, (2 to 2000 footcandles). The categories are known as A - I, and each provide a range of 3 iluminance values (low, mid and high). See Table 1.

TABLE 1

ACTIVITY

Public spaces with dark surroundings 2-3-5

Simple orientation for short temporary visits

Working spaces where visual tasks are only occasionally performed

Performance of visual tasks of high contrast or large size

Performance of visual tasks of medium contrast or small size

Performance of visual tasks of low contrast or very small size

Performance of visual tasks of low contrast or very small size over a prolonged period

Performance of very prolonged and exacting visual tasks

Performance of very special visual tasks of extremely low contrast I

STEP 3 - determine illuminance RANGE. (from Table 1).

STEP 4 - select WEIGHTING factors:for category A-C use 'Table 1a' below.for category D-I use 'Table 1b' below.

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Weighting Factor-1 0 +1

Occupant ages under 40 40-55 over 55Average room surface reflectances more than 70% 30-70% less than 30%

INSTRUCTIONS for Table 1a: Add both weighting factors algebraically.If the total factor is -2 use the low illuminance value.If the total factor is +2 use the high illuminance value.If the total factor is 0 use the middle illuminance value.

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Weighting Factor-1 0 +1

Occupant ages under 40 40-55 over 55not important important critical

more than 70% 30-70% less than 30%

INSTRUCTIONS for Table 1b: Add all 3 weighting factors algebraically.If the total factor is -2 or -3 use the low illuminance value.If the total factor is +2 or +3 the high illuminance value.Otherwise use middle illuminance value.

EXAMPLE

STEP 1 - What illuminance is recommended for an adult aged 56, performing detailed accounting tasks of medium contrast or small size?

factor +1

TABLE - 1a - (for Categories A-C)

ROOM AND OCCUPANT CHARACTERISTICS

TABLE - 1b - (for Categories D-I)

ROOM AND OCCUPANT CHARACTERISTICS

Importance of speed and/or accuracyReflectance of task background

STEP 2 - From 'Table 1' we identify CATEGORY' E' as the appropriate category.

STEP 3 - From 'Table 1' we also identify the illuminance RANGE as 50-75-100 fc.

STEP 4 - From 'Table 1b' we calculate the weighting factor:

AGE - 56 IMPORTANCE OF SPEED AND ACCURACY - (important) factor 0BACKGROUND REFLECTANCE - (medium contrast, about 40%) factor 0

---------+1

In accordance with 'Table 1b' instructions, we use a weighting factor of +1 and then select the middle value of 75 footcandles for the task.

STEP 1 - What illuminance is recommended for an adult aged 56, performing detailed accounting tasks of medium contrast or small size?

In accordance with 'Table 1b' instructions, we use a weighting factor of +1 and then select the middle value of 75 footcandles for the task.

iesna lighting levels

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