Electrical Thumb Rules-Illumination-(Part-19).

Recommended Lighting Levels For Sports Areas  

Bowls 20 lux 50 lux 100 lux 150 lux
Tennis 50 lux 100 lux 150 lux 250 lux
Football 50 lux 100 lux 250 lux 450 lux
Cricket Outfield 50 lux 100 lux 250 lux 450 lux
Cricket Pitch 100 lux 200 lux 400 lux 600 lux
Hockey 50 lux 100 lux 250 lux 350 lux
Swimming 50 lux 100 lux 150 lux 250 lux


Industrial & Office Applications Lux Level

General Engineering Rough Work 160 lux
General Engineering Medium Work 400 lux
General Engineering Fine Work 800 lux
General Engineering Very Fine Work 1600 lux
Inspection Areas Rough Work 160 lux
Inspection Areas Medium Work 320 lux
Inspection Areas Sub Assemblies 400 lux
Inspection Areas Fine Work, electric & high precision mechanical 800 lux
Offices Entrance halls and receptions areas 160 lux
Offices Conference facilities, general offices, typing and filing 500 lux
Offices Computer and business machine operation 630 lux
Offices Drawing Offices 800 lux
Outdoor Areas Mechanical loading 10 lux
Outdoor Areas Manual loading 10 lux
Outdoor Areas Service station forecourts 160 lux
Warehousing Inactive storage 20 lux
Warehousing Loading bays and large materials storage 100 lux
Warehousing Small material storage, packing and dispatch 200 lux


Recommended Lighting Levels

Characteristics of Activity Representative Activity Illuminance (lux)
Interiors rarely used for visual tasks (no perception of detail) Cable tunnels, nighttime sidewalk, parking lots 50
Interiors with minimal demand for visual acuity (limited perception of detail) Corridors, changing rooms, loading bay 100 – 150
Interiors with low demand for visual acuity (some perception of detail) Foyers and entrances, dining rooms, warehouses, restrooms 200
Interior with some demand for visual acuity (frequently occupied spaces) Libraries, sports and assembly halls, teaching spaces, lecture theaters 300
Interior with moderate demand for visual acuity (some low contrast, color judgment tasks) Computer work, reading & writing, general offices, retail shops, kitchens 500
Interior with demand for good visual acuity (good color judgment, inviting interior) Drawing offices, chain stores, general electronics work 750
Interior with demand for superior visual acuity (accurate color judgment & low contrast) Detailed electronics assembly, drafting, cabinet making, supermarkets 1000
Interior with demand for maximum visual acuity (low contrast, optical aids & local lighting will be of advantage) Hand tailoring, precision assembly, detailed drafting, assembly of minute mechanisms 1500 -2000+


Interior Light Levels

Environment Required Light Level
 Storage Area / Plant Room (minimal movement of people) 150 – 200 Lux
 Construction Areas & Loading Bays (minimal perception of detail) 300 – 500 Lux
 Factories & Kitchens (higher perception of detail) 500 – 750 Lux
 Inspection, Welding, And Machinery (demanding work) 750 – 1000 Lux
 Electronics & Textile Production (repetitive detail) 1000 – 1500 Lux
 Technical Offices (accurate detail) 1500 – 3000 Lux
 Jewelers & Goldsmiths (precision detail) 3000 + Lux


Outdoor Light Levels

Environment Required Light Level
Very Bright Summer Day Up To 100,000 Lux
Overcast Summer Day 30,000 – 40,000 Lux
Floodlit Football Match 700 – 16,000 Lux
Shady Room In Daylight 250 – 300 Lux
Night Light On A Building 60 Lux
Night-Time Urban Street 10 Lux
Night-Time Car Park 1 Lux
Security Floodlights 700-1300 Lux
Shed Lights 150-300 Lux
Lamp Posts 120-180 Lux
Landscape Spotlights 120 Lux
Outdoor Path Lighting 100 Lux
Path lighting. 100 Lux
Landscape Lights 100-300 Lux
Garden lights 20 Lux


Illumination Level

Light levels as per IS 1944
Classification of Road Type of road illumination (lux)
Group A1 Important traffic routes carrying fast traffic 30
Group A2 Other main roads carrying mixed traffic, like main city streets, arterial roads, throughways etc 15
Group B1 Secondary roads with considerable traffic like principal local traffic routes, shopping streets etc 8
Group B2 Secondary roads with light traffic Important traffic routes carrying fast traffic 4


Illumination Level

Average Maintained Illuminance
High lux Medium lux Low lux
Major/Major 34 26 18
Major/Collector 29 22 15
Collector/Collector 24 18 12
Collector/Local 21 16 10
Local/Local 18 14 8


Interior Lighting Level

Chartered Institute of Building Services Engineers CIBSE  Part 2 (2002)

Illuminance (lux) Activity Area
100 Casual seeing Corridors, changing rooms, stores
150 Some perception of detail Loading bays, switch rooms, plant rooms
200 Continuously occupied Foyers, entrance halls, dining rooms
300 Visual tasks moderately easy Libraries, sports halls, lecture theatres.
500 Visual tasks moderately difficult General offices, kitchens, laboratories, retail shops.
750 Visual tasks difficult Drawing offices, meat inspection, chain stores.
1000 Visual tasks very difficult General inspection, electronic assembly, paintwork, supermarkets.
1500 Visual tasks extremely difficult Fine work and inspection, precision assembly.
2000 Visual tasks exceptionally difficult Assembly of minute items, finished fabric inspection.


Illumination levels of Switch Yard

AS/NZS 1158.3.1

Switchyard area lighting targets Illuminance (lx)
HV areas including any overhead line road crossings and any access path zone type infrastructure 10
Non-HV areas and general open areas 5
Isolated areas such as back of buildings, corners of switchyards away from HV Equipment 2


Sub Station Light Levels


Environment Required Light Level
CONTROL ROOM / Switch gear Room 300
Battery Room 150
Communication Room 300
Offices/Engineers’ Room/Other Office Room 300
Toilet 100
Outdoor Switchyard area including road 30
Stairs 100
Corridor 100
Road within campus including colony area 30
Maintenance room 150
Any other spot where high level of illumination required 150
Dormitory & ‘C’ type quarters 150
Auxiliary Buildings like Pump room and other houses 150
ACDB- DCDB room/Store / Store Office 150
Conference room 300
Tiffin room/Kitchen 150
GIS Hall 150


Sub Station Light Levels


Environment Required Light Level
Control Room 350
PLCC Room 300
LT Room 150
Charger Room 150
Cable Gallery 150
Heating Plant 100
Battery Room 100
Computer Room 300
Entrance lobby 150
Corridor and landing 150
Conference and display 300
Rest Room 250
AHU Room 100
DG Set Building 150
Fire Fighting Pump House 150
Switchyard – Main equipment 50
Switchyard – general equipment and balance 30
Street/Road 30


About Jignesh.Parmar (B.E,Mtech,MIE,FIE,CEng)
Jignesh Parmar has completed M.Tech (Power System Control), B.E(Electrical). He is member of Institution of Engineers (MIE) and CEng,India. Membership No:M-1473586.He has more than 16 years experience in Transmission -Distribution-Electrical Energy theft detection-Electrical Maintenance-Electrical Projects (Planning-Designing-Technical Review-coordination -Execution). He is Presently associate with one of the leading business group as a Deputy Manager at Ahmedabad,India. He has published numbers of Technical Articles in “Electrical Mirror”, “Electrical India”, “Lighting India”,”Smart Energy”, “Industrial Electrix”(Australian Power Publications) Magazines. He is Freelancer Programmer of Advance Excel and design useful Excel base Electrical Programs as per IS, NEC, IEC,IEEE codes. He is Technical Blogger and Familiar with English, Hindi, Gujarati, French languages. He wants to Share his experience & Knowledge and help technical enthusiasts to find suitable solutions and updating themselves on various Engineering Topics.

2 Responses to Electrical Thumb Rules-Illumination-(Part-19).

  1. Renga Ramanujan C says:

    Dear Sir,

    kindly suggest the backup standards for the safety ground clearance for outdoor swyd (i.e for 66kV you have mentioned 4000mm) Please help on the same.

    Thanks and Regards
    Renga Ramanujan C

  2. Muhammad Mohsin Ansari says:

    Thanks you very much Jignesh.Parmar

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