D7BCT datasheet(33/54 Pages) OSRAM

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OSRAM DULUX® EL – electronic energy saving lamps

Economical alternatives to ordinary light bulbs

Technical Guide

3.4

Temperature

influences

3.4.1 Dependence on

burning positions

and temperatures

OSRAM DULUX® EL LONGLIFE, OSRAM DULUX® EL FACILITY and OSRAM DULUX® EL

SENSOR Plus can be used in a temperature range from -30°C to +50°C.

Exceptions:

OSRAM DULUX® EL LONGLIFE 3 W

from +5°C to +50°C

OSRAM DULUX® EL LONGLIFE 5 W

from -20°C to +50°C

OSRAM DULUX® EL VARIO

from +15°C to +50°C

OSRAM DULUX® EL ECONOMY

from -15°C to +40°C

OSRAM DULUX® EL ECONOMY CLASSIC

from -15°C to +40°C

OSRAM DULUX® EL ECONOMY GLOBE

from -15°C to +40°C

OSRAM CIRCOLUX® EL 24 W T5

from -10°C to +50°C

At lower temperatures than those specified the high starting voltage may destroy the

lamp. The thermal load on the components at temperatures above 50°C may lead to

the premature failure on the integrated electronic control gear.

The luminous flux of Hg low pressure discharge lamps such as the OSRAM DULUX® EL

is dependent on the mercury vapour pressure in the lamp and therefore on the tempe-

rature at the coolest point (cf. 2.1).

When OSRAM DULUX® EL lamps are used in the base up position, the bends in the

tubes act as cold spots. Optimum luminous flux is reached when these bends have a

temperature of 45°C. This is the case for base up and horizontal positions at an

ambient temperature of 20 to 25°C. In the base down position, the rising heat causes

cold spots (controlling the Hg vapour pressure) to form in the cylindrical part of the

discharge tube; the highest luminous flux in the base down position is reached when

the ambient temperature is around -5°C.

For free-burning lamps the ambient temperature corresponds to the room temperature.

If the lamps are operated in luminaires, the temperature in the immediate vicinity of the

lamp is crucial for the luminous flux.

3. Lamp data and lamp properties

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