H400D datasheet(20/24 Pages) OSRAM

20 / 24 page

TS 44842 OSRAM / POWERSTAR HQI 106 T001 GB

4/24.5.2007

Lamp life

There are a confusing number of definitions for lamp life,

and these differ from one region to the next and from one

application to the next. The basic definitions for the most

common types are given below.

This document refers explicitly only to the

average life.

Average life:

Average number of hours burned over several groups in

which in the group in question half the lamps have failed

as the result of a defect (50% failure).

Survival rate:

Quantity of working lamps of a group of lamps after a

defined number of burning hours.

Average value of some groups.

Minimum life:

Minimum period of time in which a lamp remains in opera-

tion under laboratory conditions.

Economical life:

Period of time between group relamping of an installation

under the condition that operating costs are minimised

and the installation luminous flux does not fall below

a particular value. This will vary according to the appli-

cation.

Service life:

Simplified practical view of the economical life.

This is the operating time after which the installation

luminous flux (the product of the relative luminous flux

and the lamps still in operation) is still around 70%

(sometimes 80%).

POWERSTAR HQI-T ʺ 150 W

120

110

100

105

110

Mains voltage

Φ = Luminous flux

IL = Lamp current

PL = Lamp wattage

UL = Lamp voltage

= Not permitted

POWERSTAR, other versions

120

110

100

105

110

Mains voltage

Operating characteristics in relation to

the supply voltage

Photometric and electrical data:

All lamp-specific electrical and photometric data is

measured after 100 hours of operation under laboratory

conditions on reference equipment.

Unless otherwise indicated, the data relates to the hori-

zontal burning position for T and TS types and to the

base up burning position for E types. If different burning

positions are used in actual practice there may be consid-

erable changes in the lamp data, particularly with regard

to luminous flux, colour temperature and lamp life.

The luminous flux is virtually unaffected by the ambient

temperature outside the luminaire. At low ambient tem-

peratures down to around – 50 °C special igniters are

needed.

Detailed information on heat accumulation tubes (lumi-

naire simulators) for determining lamp data for HQI®-TS

and HCI®-TS is given in IEC 61167, clause 1.7.

Colour deviations:

With all metal halide lamps there may be differences in

colour from one lamp to the next due to external factors

such as mains voltage, type of control gear used, burning

position and luminaire design.

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