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Osram HQI-E 150 W/NDL CL Technical Information Page 38

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3
8
M
easures to comp
l
y w
i
t
h
a requ
i
re
d
m
i
n
i
mum
ligh
t-
in
g
level include re
g
ular cleanin
g
o
f
the room and the
luminaire, as well as timel
y
replacement o
f
the lamps.
Timel
y
replacement o
f
the lamps also ensures avoid
-
ance,
f
or the most
p
art, o
f
undesirable e
ff
ects at the
end o
f
the lam
p
service li
f
e
.
Wh
en comp
ili
n
g
t
h
e ma
i
ntenance p
l
an, cons
id
erat
i
on
must be
g
iven to the decrease in luminous
f
lux ove
r
the course o
f
the lam
p
service li
f
e in the
f
orm o
f
the
lam
p
luminous flux maintenance factor
(
LLMF
).
The
C
IE has stated a
g
eneral luminous flux curve fo
r
meta
l
h
a
lid
e
l
am
p
s w
hi
c
h
resu
l
ts
i
n a ma
i
ntenance
f
actor of 0.68, for exam
p
le, for 9000 h
.
G
iven the lesser dro
p
in luminous flux in P
O
WERBALL
H
CI
®
over the service li
f
e compared to standard metal
h
a
lid
e
l
amps w
i
t
h
c
yli
n
d
r
i
ca
l
tu
b
e, t
h
e ma
i
ntenance
fac
t
o
r f
o
r
9000
h i
s
0
.
8.
E
xam
pl
e
f
or a ma
i
ntenance
pl
a
n
M
a
i
ntenance
pl
a
n
O
nly re
g
ular maintenance can ensure compliance with the stipulated illuminance levels in the EN 12464
standard
f
or the li
g
htin
g
system. The
f
ollowin
g
maintenance intervals must there
f
ore be
f
ollowed
.
Room
T
ype o
f
surroundin
g
: Normal
M
a
i
ntenance
i
nterva
l
: ever
y
2
Y
ears
Lu
m
i
n
ai
r
e
XXX
Influence of reflections from the room surfaces: medium
(
Room index 1.1 < k < 3.75
)
Lu
m
i
n
ai
r
e
cha
r
ac
t
e
r
is
t
ics
:
di
r
ect
Re
f
lector t
y
pe: B – Re
f
lector open at the to
p
Lamp t
y
pe : Metal Halide lamp (CIE
)
Ballast:
CCG
O
peratin
g
hours per year: 300
0
Maintenance interval
(
Luminaire
)
: ever
y
2 Years
Maintenance interval
(
Lamp
)
: ever
y
3.5 Year
s
F
a
il
e
d
l
amps are rep
l
ace
d
i
mme
di
ate
ly
:
Y
e
s
M
a
int
e
n
a
n
ce
fac
t
o
r:
0
.
61
M
a
int
e
n
a
n
ce
in
s
tr
uc
ti
o
n
s:
Lamps must be replaced with suitable replacement lamps of the same characteristics
(
luminous flux, li
g
ht
color, color renderin
g)
. Any existin
g
starters should also be replaced durin
g
relampin
g.
T
he room and sur
f
aces de
f
lectin
g
li
g
ht are to be maintained so as to preserve the ori
g
inal re
f
lection
cha
r
ac
t
e
r
is
t
ics.
A
lways comply with the manu
f
acturer’s cleanin
g
instructions
.
In practice, this results in the
f
ollowin
g
application
cases
(
see also table 2
)
:
To
ac
hi
e
v
e
a
co
n
s
t
a
nt l
u
min
ous
f
l
u
x
of
min.
500
lx
throu
g
hout the service li
f
e, takin
g
cleanin
g
and chan
g
e
intervals into account, the
f
ollowin
g
applies initially:
•
S
tandard lamp and lamp chan
g
e after 3 years,
i.e. for an LLMF of 0.68
(
case 1
):
962
lx
approx. 17% higher illuminance,
i.e. more luminaires
•
P
O
WERBALL H
CI
®
and lamp chan
g
e a
f
ter
3
y
ears, i.e. for an LLMF of 0.8
(
case 2
):
8
2
0
l
x
•
S
tandard lamp and lamp chan
g
e for an LLMF of
0.8, here after 14 months
(
case 3
):
8
2
0
l
x
lamp chan
g
e required after 14 months
,
as 80
%
o
f
the initial lumens achieved
af
t
e
r
3500
h
.
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