Technical data
QUICKTRONIC
®
Intelligent DALI DIM | Additional properties of dimmable control gears from OSRAM
35
Why is hardly any light lost through the temperature
limitation?
Let's assume we have a luminaire with an internal tempera-
ture, i.e. the lamp ambient temperature, that should be low-
ered from 65 °C to 55 °C. A reduction of the system power
by 20 % is required for this purpose. The diagram shows
the Φ(T) curves of T5 lamps for 100 % system power and,
according to the power reduction of 20 %, for 80 % system
power. When transitioning from the 100-% curve to the
80-% curve and the resulting reduction in the temperature
of 10 °C, the luminous fl ux remains nearly the same.
4.8.2 Color temperature
The color temperature of the lamp changes between the
maximum and minimum luminous fl ux of the lamp – in the
case of the DULUX L, this is approx. 150 Kelvin. Visually,
the color difference looks much greater due to the huge
difference in light density. This means that the subjective
perception of the human eye does not refl ect the objective
color temperature change. Directly after switching from
maximum to minimum luminous fl ux, a short color shift of
up to 400 Kelvin occurs (shift to red section, see diagram
top right) that is reduced after approx. 30–40 minutes to
the aforementioned color difference (stabilization phase).
The measurement of the most similar color temperature in
the case of strongly dimmed lamps makes the highest de-
mands of the electronics and the receiver of the colorime-
ter. Erroneous evaluations with standard colorimeters can
not be ruled out.
4.8.3 Outdoor applications
For outdoor applications, a special OSRAM housing, the
“OUTKIT”, is available for protecting the ECG against mois-
ture. It is available for ECGs with a total height of 30 mm or
21 mm and lengths of 360 mm and 423 mm.
Details can be found in the current light program. For out-
door applications, the temperature range of the system
lamp/ECG should be carefully considered. Suffi cient mains
quality (above all, lightning protection) must be available for
all outdoor applications, so that the ECGs are not dam-
aged.
4.8.4 Functional testing for luminaires
The dimmable OSRAM QTi family (DALI and 1…10 V) out-
puts the following power per lamp in the luminaire test (with
10- substitute resistors):
1/2 lamps (T5 and T8): 32 watts
3/4 lamps (T5 and T8): 16 watts
This function does not depend on the application of the re-
al lamp. The fi lament detection can be switched off for spe-
cial applications/luminaires – details upon request.
If the fi nal luminaire test is executed in Touch DIM opera-
tion, it must be ensured that the lamp is dimmed to 10 %
before disconnecting the luminaire from the mains. This is
the only way to ensure that the light can also be switched
on with the fuse (without control unit) while installing the
40 50 60 70 80
Lamp ambient temperature [ °C]
10 20 30
Reduction and relative luminous flux
Standard color table according to DIN 5033
Relative luminous fl ux [%]
Reduction
20
0
40
60
80
100
Φ (T) curves of T5 lamps
Note: