Osram HQI-E 150 W/NDL CL Technical Information Page 14

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14
The main advanta
g
es o
f
electronic ballasts are
described in
g
reater detail in the
f
ollowin
g
section
.
3.2.3.1
R
e
d
uc
i
n
g
ener
gy
consumpt
i
on
C
ompared to conventional ballasts, electronic ballasts
can cons
id
era
bl
y re
d
uce ener
g
y consumpt
i
on over t
h
e
service li
f
e. The ener
g
y savin
g
s result
f
rom two
f
actors
:
1
)
Unit
p
ower dissi
p
ation:
In conventional ballasts a lar
g
e amount o
f
ener
g
y
is lost in dissi
p
ated heat on account o
f
the
d
es
ig
n.
B
y contrast, e
l
ectron
i
c
b
a
ll
asts
h
ave a
l
ow-
l
oss
d
es
ig
n w
i
t
h
top qua
li
ty components,
reducin
g
dissipation to less than 10
%
o
f
the
nom
i
na
l
p
ower
.
2
)
Increase in watta
g
e over service life
:
The system watta
g
e with conventional ballasts
uctuates si
g
ni
cantly over the service li
f
e o
f
the
lamp. This results
f
rom the chan
g
e in lamp volt
-
a
g
e, which can increase by up to 30
%
throu
g
hout
the service life
(
see also chapter 3.1.2
)
, resultin
g
in considerable
uctuations in lamp watta
g
e.
B
y
contrast, electronic ballasts operate the
l
amps a
l
ways w
i
t
h
constant watta
g
e t
h
rou
gh
out
th
e
e
ntir
e
se
rvi
ce
li
fe
. Th
e
m
a
xim
a
l t
o
l
e
r
a
t
ed
f
luctuation is 3
%
. This means
f
or example that
f
or a 70 W ceramic arc tube lam
p
, the electronic
b
a
ll
ast constant
ly
prov
id
es t
h
e
l
amp w
i
t
h
t
h
e
r
a
t
ed
7
3
W.
3.2.3.2 Lam
p
service li
f
e and cut-out at the end o
f
the
se
rvi
ce
li
fe
A
detailed descri
p
tion o
f
the lam
p
service li
f
e and
f
ail-
u
re behavior usin
g
conventional ballasts can be
f
ound
i
n c
h
a
p
ter 6
.
Electronic ballast o
p
eration also o
ff
ers considerable
advanta
g
es in terms of lamp service life and cut-out
be
h
a
vi
o
r
a
t th
e
e
n
d
of
th
e
se
rvi
ce
li
fe.
C
omprehensive laborator
y
tests and extensive practi-
ca
l
ex
p
er
i
ence s
h
ow t
h
at o
p
erat
i
on on e
l
ectron
i
c
b
a
l-
lasts has a si
g
ni
f
icantly positive in
f
luence on the lamp
service li
f
e. Precise but
g
entle lamp i
g
nition, a more
sta
bl
e t
h
erma
l
b
a
l
ance t
h
an
k
s to constant watta
g
e
M
a
g
net
i
c
b
a
ll
ast Electronic ballast P
O
WERTR
O
NI
C
®
E
ner
g
y consumpt
i
o
n
1
00
10 to 15
%
savin
g
s over the service
li
fe
L
amp serv
i
ce
life
1
00
Up to 30
%
lon
g
er dependin
g
on
lamp t
y
pe and kind o
f
us
e
L
am
p
start-u
p
D
epen
d
s on t
y
pe: usua
lly
approx.
60 to 90 sec. to reach 90
%
o
f
the
luminous
f
lux leve
l
U
p
to 50
%
f
aste
r
Colour stabilit
y
Colour variation
p
ossibl
e
Clearly reduced scatterin
g
; initial and
o
v
e
r
se
rvi
ce
li
fe
C
ut-out at end of lam
p
service
life
N
ot ava
il
a
bl
e or on
ly
s
i
mp
l
e
cu
t-
ou
t m
echa
n
is
m
s
P
ermanent
p
arameter contro
l
,
i
nte
llig
ent cut-out mec
h
an
i
sms
I
gn
i
t
i
on cut-out
O
nly with timer ignition unit
s
I
gn
i
t
i
on t
i
me
li
m
i
te
d
to 18 m
in
Ligh
t
fli
c
k
e
r
V
i
s
i
b
l
e
f
li
c
k
er
Flicker-
f
ree thanks to 165 Hz o
p
eratio
n
C
onsistent wattag
e
I
ncrease
i
n watta
g
e over serv
i
ce
li
f
e, also de
p
endent on
f
luctua
-
t
i
ons
i
n temperature an
d
supp
ly
vo
l
ta
g
e, an
d
on
l
ea
d
l
en
g
t
h
+
3
%
over the entire service li
f
e
,
re
g
ardless o
f
f
luctuations in
temperature an
d
supp
l
y vo
l
ta
g
e
o
r
l
ea
d
l
en
g
t
h
Handlin
g
3 com
p
onents, com
pli
cate
d
w
i
r
i
n
g
1 un
i
t, s
i
mp
l
e w
i
r
i
n
g
S
ize and wei
g
h
t
H
eavy, severa
l
components,
l
ar
g
e
i
n
so
m
e
cases
Ligh
t an
d
compac
t
Power factor correction
(
PF
C)
0.5 – 0.95, cons
id
era
bl
e a
gi
n
g
f
l
uc
t
ua
ti
o
n
s
>
0
.
95
N
o
i
se
d
eve
l
o
p
men
t
C
learly audible hummin
g
possibl
e
Al
m
os
t n
oiseless
Bidi
rect
i
ona
l
d
ata exc
h
an
g
e
Not
p
ossible
G
enerall
y
possible
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