Civil Engineering Reference
In-Depth Information
Table 16.1
Light-limiting parameters as defined by CIE. (CIE
2013
)
ULR
UFR
I
90
−
110
E
vert,property
I
property
L
facade
L
veil
√
√
√
At area to be lighted
x
x
x
x
√
√
√
√
At location of disturbance
x
x
x
√
√
√
√
√
√
√
Luminaire(s) position as
installed
√
√
√
√
√
√
Direct light only
x
√
Direct
+
reflected light
x
x
x
x
x
x
√
Critical zone around
horizontal
x
x
x
x
x
x
√
Impulse for design to
required lighting level
x
x
x
x
x
x
Table 16.2
Light-limiting parameters as defined by IDA and IESNA. (IDA-IES
2011
)
lum,tot
lum,tot
/m
2
surf,virt
/
lum,tot
E
vert,virt
BUG
√
√
√
√
√
At area to be lighted
At location of disturbance
x
x
x
x
x
√
√
Luminaire(s) position as installed
x
x
x
√
√
√
√
√
Direct light
Direct
+
reflected light
x
x
x
x
x
√
Critical zone around horizontal
x
x
x
x
√
√
Impulse for design to required
lighting level
x
x
x
16.4
Summary
16.4.1
CIE Parameters
Table
16.1
summarises the light-limiting parameters as defined by CIE, with some
of their typical properties.
16.4.2
IDA-IESNA Parameters
Table
16.2
summarises the light-limiting parameters as defined by IDA-IESNA, with
some of their typical properties.
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