OSRAM DULUX F - Manual (Page 86)

Economical long-life light sources with plug-in bases
Compact Fluorescent Lamps OSRAM DULUX ®
Technical Guide
84
The diagram shows an example of an OSRAM DULUX ® D/E 26 W lamp.
The I d „1-pin“ and I d „2-pin“ lines in the diagram show the discharge current for the two limiting cases.
1. The discharge current of the lamp is fed only via one lead wire
2. The discharge current of the lamp is fed equally via the two lead wires
The intersection of the curve with the line I d „1-pin“ with I 2
Pin 1
+ I 2
Pin 2
min (= minimum) gives the value
of the minimum discharge current below which heating must be provided.
The optimum dimming operation would be along the target line. If there are any deviations toward
smaller values for I
2
Pin 1
+ I 2
Pin 2
the life of the lamp will be significantly reduced. If I 2
Pin 1
+ I 2
Pin 2
is above
the target value, blackening might be observed at the ends of the lamp. Proper lamp operation
cannot take place below the „Minimum“ line or above the „Maximum“ line. Only burning duration
tests can give a reliable indication of achievable lamp life in dimmer mode. These tests must be
performed by the control gear manufacturers. Control gear manufacturers are also responsible for
carrying out tests on the permissible ambient temperature ranges and on stability in dimmer mode.
For optimum operation, new lamps should be burnt in (seasoned) for 100 hours at full output before
they are dimmed for the first time.