"This International Standard is applicable to replaceable and standardised lamps (filament lamps@ discharge lamps and LED light sources) to be used in headlamps@ fog-lamps and signalling lamps for road vehicles. In some applications@ these lamps may be installed as nonreplaceable. This standard is especially applicable to those lamps which are the subject of legislation. In particular@ it includes the lamps contained in Regulations No. 37@ No. 99@ No. 128 and its series of amendments of the Geneva Agreement of 20 March 1958 of the United Nations Economic Commission for Europe (UNECE). However@ the standard may be used for other lamps falling under the scope of this standard@ as well as lamps which are subject of legislation but not contained in Regulations No. 37@ No. 99 and No. 128@ e.g. the non-replaceable (filament) lamps and LED modules. For replaceable and standardised lamps@ the standard specifies the technical requirements with methods of tests and basic interchangeability (dimensional@ electrical and luminous) for lamps of normal production and for standard (??talon) lamps. For most of the requirements given in this standard@ reference is made to the ""relevant lamp data sheet"". For all lamps listed in Clause 8@ data sheets are contained in this standard or included by reference. For other lamps@ the relevant data are supplied by the lamp manufacturer or responsible vendor. It could be based on national legislation. Other requirements to replaceable and standardised lamps such as lamp life@ luminous flux maintenance@ torsion strength and resistance to vibration and shock are specified in IEC 60810. Such requirements to non-replaceable lamps are given in this standard. For some test methods@ reference is made to IEC 60810. Road vehicle lamps for supplementary purposes which are not the subject of legislation are specified in IEC 60983. In countries which legislate for approval@ for example under the terms of the aforementioned UN Regulations@ it is suggested that reference is made to this standard for assessment of compliance. IEC 60810 and IEC 60983 are not intended for that purpose. NOTE 1 In various vocabularies and standards@ different terms are used for ""incandescent lamp""@ ""discharge lamp"" and ""LED lamp"". In this standard ""filament lamp""@ ""discharge lamp"" and ""LED light source"" are used. However@ where only ""lamp"" is written all three kinds of lamp are meant@ unless the context clearly shows that it applies to one kind only. NOTE 2 Wherever the term ""device"" is used@ it is meant to designate equipment which is used as luminaire. It can take the form and purpose of a headlight or signal light."