OSRAM DULUX F User Manual
Page 60
Economical long-life light sources with plug-in bases
Compact Fluorescent Lamps OSRAM DULUX
®
Technical Guide
58
heats up and releases mercury into the discharge. This behaviour can be especially observed under
lower temperatures.
Therefore in CONSTANT lamps an additional run-up amalgam is positioned in the direct neighbour-
hood of the electrode. After the lamp is switched on, the electrode will heat up the flag containing
the run-up amalgam, so that mercury is directly released into the discharge. This results in a quick
run-up behaviour of the CONSTANT lamp that is nearly identical to a Cold Spot lamp.
Once all the mercury from the run-up amalgam is released, the operation amalgam will take over the
Hg vapour pressure control, until its final stabilization (until the light output is stabilized).
Typical run-up behaviour of OSRAM DULUX® T/E CONSTANT (amalgam lamps) in ECG operation, 25 ºC
ambient temperature, mains voltage 230 V/ 50 Hz, free-operating
0
20
40
60
80
100
120
0
50
100
150
200
250
300
R
el
at
iv
e
lu
m
in
o
u
s
fl
u
x
[%
]
Run-up time [sec]
base down
horizontal
base up