This International Standard is applicable to filament lamps, discharge lamps, LED light sources and LED packages to be used in road vehicles, i.e. in headlamps, fog-lamps, signalling lamps and interior lighting. It is especially applicable to those lamps and light sources which are listed in IEC 60809. However, the standard may also be used for other lamps and light sources falling under the scope of IEC 60809. It specifies requirements and test methods for the measurement of performance characteristics such as lamp life, luminous flux maintenance, torsion strength, glass bulb strength and resistance to vibration and shock. Moreover, information on temperature limits, maximum lamp outlines and maximum tolerable voltage surges is given for the guidance of lighting and electrical equipment design. For some of the requirements given in this standard, reference is made to data given in tables. For lamps not listed in such tables, the relevant data are supplied by the lamp manufacturer or responsible vendor. The performance requirements are additional to the basic requirements specified in IEC 60809. They are, however, not intended to be used by authorities for legal type-approval purposes. NOTE 1 In the various vocabularies and standards, different terms are used for "incandescent lamp" (IEC 60050- 845:1987, 845-07-04) and "discharge lamp" (IEC 60050-845:1987, 845-07-17). In this standard, "filament lamp" and "discharge lamp" are used. However, where only lamp is written both types are meant, unless the context clearly shows that it applies to one type only. NOTE 2 This standard does not apply to luminaires. NOTE 3 In this standard, the term LED light source is used, in other standards the term LED lamps can be used to describe similar products.