Nature of work Examples of corresponding task Minimum illumination
level in Lux
Storage, reserve Warehouses, stockrooms, supervision 50
General perception Dormitories, grinding 250
Rough detail Freight and passenger elevators,
perception escalators 50
General lighting, lecture rooms, 250
moulding, manufacturing large parts
Average detail Ironing, window dressing, packing, 400
perception labeling, heavy machine or bench
work, general office work
Rapid general inspection, studios, 550
study rooms, typing, reading, machine
sewing, assembly of average parts,
special office work
Difficult detail Repairs, difficult inspection, lathes, 800
perception hand sewing, embroidery