Datasheet
23
T
c
-
P
o
in
t
is located at a particular point on the casin
g
of the lamp to provide a
s
i
mp
l
e way to
d
eterm
i
ne t
h
e t
h
erma
l
b
e
h
av
i
or o
f
t
h
e
l
amp
i
n a
l
um
i
na
i
re.
C
om
p
liance with the Tc
p
oint tem
p
erature ensures that no com
p
onent in
t
h
e contro
l
gear
i
s expose
d
to excess
i
ve
h
eat.
Th
e
T
c po
i
nt
i
s a
l
so use
d
to
d
eterm
i
ne t
h
e temperature reserves
i
n a
l
um
i
na
i
re an
d
t
h
e max
i
mum
ambient temperature in which the luminaire can be used.
OS
RAM LED
lamps are typically designed for an ambient temperature of –20 °
C
to
+
40 °
C
.
T
CO
(
Total cost of ownership
)
TCO
includes all the costs over the entire life of a lamp or for a particula
r
operat
i
ng t
i
me.
I
t covers procurement costs, re
l
amp
i
ng costs an
d
opera
-
ting costs
(
power
)
. LED lamps now pay for themselves through their long
lif
e an
d
l
ow power consumpt
i
on
.
➔
Fi
g. 4
T
h
erma
l
outpu
t
I
n contrast to convent
i
ona
l
li
g
h
t sources,
LED
s convert a
hi
g
h
proport
i
on
o
f
e
l
ectr
i
ca
l
power
i
nto v
i
s
ibl
e
li
g
h
t.
H
owever even w
i
t
h
mo
d
ern
LED
lamps a large proportion of the energy consumed is emitted in
(
unwanted
)
h
eat.
N
evert
h
e
l
ess, t
h
ere
i
s enormous potent
i
a
l
i
n
LED
tec
h
no
l
ogy
f
o
r
reducing this still further (see also Heat Sink, T
c
T
T
point
).
➔
Fi
g.
5
T
r
a
n
s
f
o
rm
e
r
s
L
ow-volta
g
e lamps need an external transformer. A distinction is made
between conventional
(
magnetic
)
control gear
(CCG)
and electronic
control
g
ear
(
E
CG)
. Further information can be found in the technical
d
ata s
h
eets
f
or eac
h
pro
d
uct.
U
V
ra
di
at
i
on
i
s e
l
ectromagnet
i
c ra
di
at
i
on t
h
at
i
s
i
nv
i
s
ibl
e to t
h
e na
k
e
d
eye an
d
may
cause health problems.
OS
RAM LED lamps do not emit any UV radiation.
V
o
l
t
i
s the derived
S
I unit of electrical voltage. The symbol is V. Low-voltage
L
ED lamps
(
12 V
)
operate with transformers. High-voltage LED lamps
can be operated on line voltage
(
220–240 V
)
.
W
a
tt
i
s the
S
I unit of power and was used for incandescent lamps as an indi
-
cation of their light output.
S
ince modern energy-saving lamps and LED
l
amps consume
f
ar
l
ess power to ac
hi
eve t
h
e same
b
r
i
g
h
tness,
h
owever,
t
h
e wattage
i
s no
l
onger as mean
i
ng
f
u
l
.
Th
e
l
umen va
l
ue
i
s now use
d
i
n-
s
tea
d
.
W
attage compar
i
son accor
di
ng to
E
r
P
T
he EU directive for non-directional light
(
ErP DIM I
)
requires a certain
l
um
i
nous
fl
ux
f
rom
LED
l
amps to ma
k
e a compar
i
son w
i
t
h
i
ncan
d
escent
l
amps.
D
eta
il
s are g
i
ven
i
n t
h
e ta
bl
e
b
e
l
ow:
➔
Fi
g.
6
I
n
ca
n
desce
nt
lamp watta
g
e
in W
Typ
ical luminous fl ux of an
OSRAM incandescent lam
p
i
n l
u
m
e
n
Re
q
uired luminous fl ux
of LED lam
p
s as
p
er ErP DIM I
i
n l
u
m
e
n
15
90
136
25
220
249
40
415
4
7
0
60
71
0
806
75
93
5
1
,
0
5
5
1
00
1,
34
0
1
,
52
1
1
5
0
2
,
160
2
,
4
5
2
200
3,040
3,4
5
2
1 x
p
r
i
ce un
i
t
A
pprox. 8 x
pr
i
ce un
it
0
2
4
6
8
10
12
14
16
18
20
22
24
M
ont
h
s
H
alogen lamp: PAR16 50 (50 W, 950 cd, 35°, li
f
e o
f
up to 2,000 hours)
L
ED lamp: PARATH
OM
®
PAR16 50 (50 W, 950 cd, 35°, li
f
e o
f
up to 25,000 hours
)
Total costs for
p
rofessional use
(
24 h/day
)
B
rea
k
-eve
n
7.4 mont
h
Fi
g
. 6
:
T
he li
g
ht values required by the EU that are needed to refer to comparabl
e
i
ncandescent lamps are hi
g
her than those of the incandescent lamp to be replaced
.
L
umens are there
f
ore more and more important as a means o
f
comparin
g
lamp
s
a
nd their li
g
ht output
.
I
ncandescent lamp 40 W
OS
RAM PARATH
OM
®
C
LA
SS
I
C
A 40 Halogen lamp 20 W
OS
RAM PARATH
OM
®
MR
16 2
0
F
i
g. 5:
Th
ese t
h
ermograp
hi
c
i
mages s
h
ow t
h
at
LED
l
amps em
i
t very
li
tt
l
e
h
eat
.
Fig. 4:
S
ample TCO for a 50 W halogen lamp compared with a PARATHO
M
®
L
ED lamp. An LED lamp in a pro
f
essional application can pay
f
or itsel
f
a
f
ter onl
y
7
.4 mont
h
s
.