The standard values for service illuminance (Em [Lux]), color appearance (F), color rendering group (Ra), and unified glare restriction class (UGRL) according to EN 12464-1 are listed in the table for the various types of interior or activity. The ratings for service illuminance, color rendering group, and direct glare restriction class represent minimum values to be met by the lighting system.


Interiors / Activities

Em[lx]

F

Ra

UGRL

Power house, Loading plant

50

ww, nw

20

-

Boiler room

100

ww, nw

40

28

Pressure suppression chamber (atomic power plant)

200

ww, nw

80

25

Ancillary rooms, e.g. pump rooms, condenser rooms

200

ww, nw

60

25

Indoor switching plant

500

ww, nw

80

16

Control room

20

ww, nw

20

-