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OSRAM DULUX® EL – electronic energy saving lamps

Economical alternatives to ordinary light bulbs

Technical Guide

Lamp data and

lamp properties

3.1

Ignition properties/

start-up/

switching behaviour

Unless otherwise indicated, the following test conditions apply to all the technical data

specified in this document:

– Supply voltage 230 V/50 Hz

– Lamp installed (Base up), free burning

– Ambient temperature 25°C ± 1°C

For OSRAM DULUX® EL lamps, reliable starting is assured in the mains voltage range

from 198 V to 254 V and at temperatures from -30°C to +50°C, with the following

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

In contrast to fluorescent lamps with conventional control gear, OSRAM DULUX® EL

LONGLIFE lamps start without flickering in less than 1.5 s. This time is needed for

preheating the cathodes; at low temperatures this may take up to 2 s. Immediately

after starting, the lamp produces around 40 % of its rated luminous flux. At room

temperature (25°C) it then takes about 2 minutes for the lamp to reach 90 % of its

maximum luminous flux.

Thanks to this precise cathode preheating, controlled by the electronic circuitry, the

life of OSRAM DULUX® EL LONGLIFE lamps is not significantly affected by frequent

on/off switching. For a switching cycle of 30 s on/150 s off, an OSRAM DULUX® EL

LONGLIFE can handle more than 500000 switching operations in its lifetime.

The requirement here is that the lamp should remain off for at least two minutes

before being switched on again so that the PTC thermistor, which controls the starting

process in electronic control gear and which is hot while the lamp is in operation, can

cool down.

There will be a significant reduction in lamp life if this off time is consistantly less than

two minutes.

This does not apply to OSRAM DULUX® EL VARIO, OSRAM DULUX® EL SENSOR Plus

or OSRAM DULUX® EL FACILITY. These lamps can be switched on and off without

restriction. This makes the OSRAM DULUX® EL FACILITY ideal, for example, for

stairwell lighting with automatic switch off. If normal OSRAM DULUX® EL LONGLIFE

lamps are to be used for this purpose, we recommend switching over to continuous

light during the busy times morning and evening.

Because of their design (cold start within 0.2 s without cathode preheating), OSRAM

DULUX® EL ECONOMY lamps should not be used in lighting systems in which the

lamps are frequently switched on and off (e. g. stairwell lighting or motion detection

systems). For a switching cycle of 30 s on/30 s off, OSRAM DULUX® EL ECONOMY

lamps can handle more than 5000 switching operations; the average life is 8000 h for

a switching cycle of 165 s on/15 s off.

3. Lamp data and lamp properties

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