21
The Lighting Handbook
In order restrict the interfering effect, 12464-2 specifies the luminous
intensities and luminances quoted the table for outdoor spaces:
Maximum permissible interference effects outdoor lighting systems
E1 Dark areas such national parks protected places
E2 Areas with little local brightness, such industrial residential areas rural surroundings
E2 Areas with moderate local brightness, such industrial residential areas suburbs
E4 Areas high local brightness, such city centres and commercial centres
Ev the maximum vertical luminous intensity the place immission lx
I the luminous intensity each individual light source the potential direction interference cd
RUL
is the share the light output the luminaire(s) radiated above the horizontal plane with the luminaire(s)
in its/their installed position and location %
Lb the highest mean luminance building’s facade cd/m2
Ls the highest mean luminance signs cd/m2
*
In the event that there enforcement time, the higher values may not exceeded and the lower
values should preferably taken limit values
Environ-
mental
zone
Light the place
of immission
Luminous intensity
of the luminaire
Share
of light
pointing
upwards
Luminance
Ev RUL Ls
lx cd/m2 cd/m2
before enforce-
ment time*
after enforce-
ment time
before enforce-
ment time*
after enforce-
ment time
Building
facade Signs
E1 2500 50
E2 7500 500 400
E3 10000 1000 800
E4 25000 2500 1000
