Nominal Density of Light

In the workplace guidelines ASR 7 / 3 and DIN 5035 (Part 2 places of work, Part 4 lecture rooms) nominal light intensity is stipulated for lighting. This nominal light intensity is prescribed for the planning and implementation of lighting system minimum values.

General rooms, passageways and zones in buildings, offices and office-type rooms, large-scale and individual trade crafts and commercial hotels and hospitals, as well as restaurants, school and instruction rooms (general), training and instruction rooms (especially)


Designation and/or purpose of the area En [Lux] Color of light Color reproduction Grade
 General areas        
Traffic zones in storage rooms  50  ww, nw  3  3
Storage rooms for similar-type or large-part stored material  50  ww, nw  3  3
Storage rooms with search tasks in case of non-similar-type stored material  100  ww, nw  3  3
Storage rooms with reading tasks  200  ww, nw  3  2
Dispatch  200  ww, nw  3  2
Sanitary rooms, canteens  200  ww, nw  2A  1
Break and relaxation rooms  100  ww, nw  2A  1
Dressing rooms  100  ww, nw  2A  2
Wash rooms  100  ww, nw  2A  2
Toilets  100  ww, nw  2A  2
Sanitary rooms, rooms for first aid and medical support  500  ww, nw  2A  1
Rooms for anatomical compensation practices  300  ww, nw  2A  1
Teleprinter terminals, mail locations  500  ww, nw  2A  1
Telephone exchanges  300  ww, nw  2A  1
         
 Traffic routes and - zones in buildings        
Walkways in automatic high-rack facilities  20  ww, nw  3  3
For persons  50  ww, nw  3  3
For persons and vehicles  100  ww, nw  3  3
Stairs, escalators and gradient traffic routes  100  ww, nw  3  3
Loading bays  100  ww, nw  3  3
Automatic conveyors or conveyor belts in the area of traffic routes  100  ww, nw  3  3
         
 Office and office-similar areas        
Office spaces with daylight based workplaces (exclusively in direct window proximity)  300  ww, nw  2A  1
Office spaces in general  500  ww, nw  2A  1
Open-plan offices with high reflection  750  ww, nw  2A  1
Open-plan offices with medium reflection  1000  ww, nw  2A  1
Technical drawing  750  ww, nw  2A  1
Meeting and discussion rooms  300  ww, nw  2A  1
Reception rooms  100  ww, nw  2A  1
Rooms with public traffic  200  ww, nw  2A  1
Rooms for IT and PC applications  500  ww, nw  2A  1
         
 Wholesale and Retail trade        
Sales areas  300  ww, nw  2A  1
Cashier workstations  500  ww, nw  2A  1
         
 Handicraft and trade        
Motor vehicle workshops  300  ww, nw  3  2
Optician and clock maker workshops  1500  ww, nw,tw  2A  1
Manufacture of jewelry goods  1000  ww, nw, tw  2A  1
Radio and television workshops  500  ww, nw  2A  1
Hair care  500  ww, nw, tw  1A  1
Cosmetics  750  ww, nw, tw  1A  1
         
 Hotel and restaurants        
Reception  200  ww, nw  2A  1
Kitchen  500  ww, nw  2A  2
Dining rooms  200  ww  1B  -
Meeting rooms  300  ww, nw  2A  1
Self-service restaurants  300  ww, nw  1B  1
         
 Hospitals        
Bedrooms general lighting  100  ww  1B  1
Bedrooms reading lighting  200  ww  1B  1
Bedrooms investigation lighting  300  ww  1B  1
Investigation areas in general  500  ww, nw  1B  1
Dentist in general [Zone E1]  500  tw  1A  1
Dentist places of treatment [Zone E2]  1000  tw  1A  1
Operation rooms [general lighting]  1000  nw  1B  1
Operation rooms [operation field lighting]  20000-120000  nw  1B  1
Operation adjacent rooms in general  500  nw  1B  1
         
 Training and classrooms (general)        
Preschool rooms  300  ww, nw  2  A
Lecture rooms in general (at the seating place at least 0.8 * E)  300  ww, nw  2  A
Lecture rooms with daylight quotients D < 1% 500   ww, nw  2A  A
Lecture rooms [high reflection]  750  ww, nw  2A  A
Lecture rooms [medium reflection]  1000  ww, nw  2A  A
         
 Training and classrooms (particularly)        
Teaching kitchens  500  ww, nw  2A  A
Works  500  ww, nw  2A  2
Do-it-yourself, sewing and typewriter rooms  500  ww, nw  2A  1
Drawing and painting  500  ww, nw  1B  1
Physics, chemistry, biology  500  ww, nw  2A  1
Technical drawing  750  ww, nw  2A  1
Teaching resource rooms  200  ww, nw  2A  2
Assembly rooms  200  ww, nw  2A  2
Corridors  100  ww, nw  2A  3
Stairs  100  ww, nw  2A  2
Entrance halls  100  ww, nw  2A  3
Student cafeterias  200  ww, nw  2A  1
Showrooms  100  ww, nw  2A  2
Multi-purpose rooms  300  ww, nw  2A  1
Reading rooms  500  ww, nw  2A  1
Lecture halls with window  500  ww, nw  2  1
Lecture halls without windows  750  ww, nw  2  1