DL2482 datasheet(53/82 Pages) OSRAM

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4. Operating characteristics

Economical long-life light sources with plug-in bases.

Compact Fluorescent Lamps OSRAM DULUX®

Technical Guide

The following table shows the permitted maximum temperatures on OSRAM DULUX®

lamps. Exceeding one or more of the maximum values specified here will lead to:

• a noticeable reduction in lamp life

• and/or damage to the CCG or ECG

• and/or damage to the lamp base and the luminaire holder.

In the case of OSRAM DULUX® S, D, T (without amalgam), L and F the limit value of

100 ºC at measuring point 3 (cold spot) should not be exceeded. Exceeding this limit

value may cause the lamp to fail.

At cold spot temperatures above the optimum (see table 4.8) there are changes in the

electrical and photometric data of the lamps (the luminous flux is no longer at 100 %).

The limit value at measuring point 1 is 140 ºC for OSRAM DULUX® lamps with and

without amalgam. This maximum value was defined as part of the IEC standard for

safety reasons. Exceeding this value leads to softening of the plastic base and dis-

colouration of the base material.

4.8.1 Maximum

temperatures for

DULUX®-Lamps

Measuring point

2(1)

3(2)

limit values

As per

EN 60901

EN 61199

OSRAM DULUX® 2-pin (CCG operation)

90 °C

140 °C

190 °C

100 °C

OSRAM DULUX® 4-pin (ECG operation)

–

140 °C

190 °C

100 °C

OSRAM DULUX® IN 2-pin (CCG operation)

90 °C

140 °C

190 °C

–

OSRAM DULUX® IN 4-pin (ECG operation)

–

140 °C

190 °C

–

1) Measuring point 2 on the glass tube near to the filament is the hottest point on the lamp.

Measurements are taken 5 mm from the edge of the base.

2) Maximum limit value of the mercury vapour pressure (see 1.4)

On amalgam lamps (OSRAM DULUX® T and T/E...IN), the cold spots are not at the bend

in the lamp but in the lower half of the discharge tube inside the base. As far as the

luminous flux/temperature curve is concerned, it is not the value at measuring point 3

that is relevant but at the amalgam measuring point inside the base. The optimum

amalgam temperature at the measuring point (amalgam reservoir) is between 85 ºC and

115 ºC. This temperature can be measured only with specially prepared lamps.

Undershooting or overshooting the temperature range will lead to a reduction in lamp

power and luminous flux.

Measuring point 1 (IEC measuring point) is not relevant for determining the amalgam

temperature and should not be used for this purpose.

In addition, any information from ECG manufacturers regarding the permissible limit

values at temperature measuring point Tc on the ECG must be observed. If these limit

values are exceeded the life of the ECG will be reduced.

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