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Osram HQI-E 150 W/NDL CL Technical Information Page 47

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Page view 46
47
I
n
Fig
. 49, t
h
e ra
di
at
i
on output
h
as
b
een mu
l
t
i
p
li
e
d
b
y
the V'
(
λ
)
curve for illumination levels below 0.1 cd
/
m².
Th
e
di
a
g
ram s
h
ows t
h
at t
h
e perce
i
ve
d
ill
um
i
nat
i
on
level of the metal halide lamp is far hi
g
her
(
in this ex
-
ample about three times hi
g
her
)
than the hi
g
h-pressure
so
di
um vapor
l
amp
.
Ill
um
i
nat
i
on
l
eve
l
s
i
n street
ligh
t
i
n
g
are
high
er t
h
an
0.1 cd
/
m², resulting in a sensitivity between photopic
an
d
scoto
pi
c v
i
s
i
on
.
Weighting factor for eye sensitivity curve
Fi
g
. 48: Relative luminous
f
lux in lumen per 1000 lm and per 5 nm
Fi
g
. 49: Equivalent to luminous flux, takin
g
account of an e
y
e sensitivit
y
curve at a low illumination level
V
'
(
λ
(
(
)
λ
Weighting factor for eye sensitivity curve
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