DL1882 OSRAM, DL1882 Datasheet - Page 48

• Manufacturer Part Number: DL1882
• Description: LAMP, DULUX, L, I, 18W
• Manufacturer: OSRAM

Specifications of DL1882

• Supply Voltage: 58V
• Base Type: 4 Pin
• Power Rating: 18W
• Luminous Flux: 1150lm
• Length: 217mm
• Colour Temperature Typ: 2700K
• Svhc: No SVHC (15-Dec-2010)
• External Diameter: 17.5mm
• External Length / Height: 217mm
• Lamp Base Type: 4 Pin
• Rohs Compliant: Yes
• Bulb Diameter: 17.5mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Economical long-life light sources with plug-in bases.
Compact Fluorescent Lamps OSRAM DULUX
Technical Guide
4.6
4.6.1 Luminous flux/
Luminous flux
as a function of
temperature and
burning position
temperature curves
for OSRAM DULUX
lamps in general
®
Typical luminous flux/temperature curves (here OSRAM DULUX
OSRAM DULUX
or 25 ºC, depending on the burning position, only after a certain run-up time has elap-
sed, as the curves above show (see 4.3).
For free-burning lamps, the ambient temperature corresponds to the room temperature.
If lamps are operated in luminaires, the temperature in the immediate vicinity of the
lamp is the one that is relevant to any measurement of luminous flux.
The lamps can be operated in any burning position. However, different burning posi-
tions and different ambient temperatures will lead to different luminous flux values. This
is due to temperature changes at certain locations on the lamp, known as the cold
spots. For this reason, we talk about the cold spot temperature. This temperature
affects the mercury vapour pressure in the lamp and therefore the luminous flux. A
knowledge of the luminous flux/temperature curve is important for luminaire designers.
The base-up position is favoured for indoor lighting, for example, whereas the base-
down position is preferred for out-door lighting (compare the values at 0 ºC, for ex-
ample).
OSRAM DULUX
ranges. OSRAM DULUX
and emit more than 90 % of their maximum luminous flux over a wide temperature
range. If both types are used in a system with several luminaires there may, however,
be differences in colour perception and brightness. For this reason the two types
should not be used in combination.
Depending on the burning position the maximum luminous flux will be reached only
after a certain Run-up time (see 4.3). Under optimum conditions in CCG and ECG
operation, all the lamps require a burn-in time of 100 h (ageing).
100 %
80 %
60 %
40 %
20 %
0 %
-20
®
®
lamps achieve 100 % luminous flux at ambient temperatures of 15 ºC
and OSRAM DULUX
®
-10
®
IN amalgam lamps are ideal for high ambient temperatures
0
10
Ambient temperature for lamp ( C)
®
20
IN lamps are optimised for various temperature
30
40
Base down and horizontal
Base up
4. Operating characteristics
50
®
T/E).
60
70
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