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Bright surfaces, however,
pleasantly enhance the room climate.6.
ĒZ
.17
The Lighting Handbook
Illuminance levels ceilings
and walls
Spatial illumination
Unlit ceilings and walls create unpleasant
room impression. fact, these levels ought to
be sig
nificantly exceeded and should at
least 175 walls.
* offices, class rooms, hospitals
In order enhance people’s and objects’
recognisability room, basic requirements
are placed cylindrical illuminance and
modelling.
The 12464 standard therefore
requires illuminance level least lx
or lx* ceilings and least or
75 lx* walls.
Hence, should high 150 in
rooms used for communication.
Modelling the ratio between cylindrical
and horizontal illuminance specific point
and should between 0.3 and 0
