DS5840 datasheet(68/82 Pages) OSRAM

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7. Measuring OSRAM DULUX®

compact fluorescent lamps

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

Compact Fluorescent Lamps OSRAM DULUX®

Technical Guide

Unless otherwise indicated, the lamp data in this guide is based on an ambient

temperature of 25ºC ± 1 ºC in draught free air in accordance with DIN 5032 (Sheet 4).

Lamp data as a function of actual ambient temperature or cold spot temperature is

also measured in draught free air.

Reference lamps (luminous flux and electrical values) can be obtained from the accre-

dited test laboratory of OSRAM GmbH (DAR register number: DAT-P-043/94-00,

Lighting Technology). Reference lamps are also available with thermoelements cemen-

ted at measuring point 3.

For prices and delivery times please contact:

OSRAM GmbH

Dept. CFL M-M

Hellabrunner Str. 1

Tel.:

(+49) 89/6213-2604

D - 81536 München

Fax.: (+49) 89/6213-4052

The cold spot temperatures are dependent on the burning

position and lie approximately in the range from 40ºC to 50ºC

(optimum operating conditions). In the base-up operating

position and no air circulation, temperature measuring point 3

(see 4.8 – Lamp temperatures and limit values) generally

corresponds to the cold spot.

The cold spot can however shift as a result of a different

operating position or other influences.

Measuring point 3 (cold spot temperature in base-up operating position) is defined for

OSRAM DULUX® lamps at the outer lamp arc, centred on the bulb. (See 4.8)

To determine the temperature at measuring point 3 (not in the case of the IN version)

thermocouples (NiCr-Ni thermo-elements) are cemented there with a neutral, trans-

lucent adhesive.

7.5.2 Cold spot

temperature for

amalgam-free

lamps

7.6

Reference lamps

7.5.1 Ambient

temperature

Cold spots

Amalgam lamps (OSRAM DULUX® T IN and T/E IN) are specially designed for high

ambient temperatures. They therefore achieve their optimum operating conditions

(rated data) only at the high temperatures that occur, for example in compact luminai-

res. Maximum luminous flux (

≥ 90 % of rated value) is achieved in the 10 to 70ºC tem-

perature range. If photometric measurements are taken under reference conditions (an

ambient temperature of 25ºC, see 7.5.1), it must be remembered that the measured

luminous flux may be as much as 10% below the maximum luminous flux that the

lamp can produce.

7.5.3 Measuring

amalgam lamps

DS5840 Datasheet(PDF) 68 Page - OSRAM GmbH

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