Document ID: chunk:federal_register_of_legislation:F2023C00228:front:0:p11
Version: federal_register_of_legislation:F2023C00228
Segment Type: other
Provision Reference: 
Character Range: 31126–33918

reflectors are indivisible. For this type of assembly, the requirements of Paragraph 6 shall apply.

       5.4. The components by which the filament lamp is fixed to the reflector shall be so made that, even in darkness, the filament lamp can be fixed in no position but the correct one. The filament lamp-holder shall conform to the dimensional characteristics as given in the following data sheets of IEC Publication 61-2:

Filament lamp  Holder   Data sheet

R2             P45t-41  7005-95-1

HS1            PX43t    7005-34-1

       5.5. Headlamps designed to satisfy the requirements both of countries in which traffic moves on the right and of those in which it moves on the left may be adapted for traffic on a given side of the road either by an appropriate initial adjustment when the vehicle is fitted out or by selective setting by the driver. Such initial adjustment or selective setting shall consist, for example, of fixing either the optical unit at a given angle on the vehicle or the filament lamp at a given angle in relation to the optical unit. In all cases, only two precisely differentiated setting positions, one for right-hand and one for left-hand traffic, shall be possible, and the design shall preclude inadvertent shifting of the headlamp from one position to another or its setting in an intermediate position. Where two different setting positions are provided for the filament lamp, the components attaching the filament lamp to the reflector must be so designed and manufactured that, in each of its two settings, the filament lamp will be held in position with the precision required for headlamps intended for traffic on only one side of the road.

       5.6. Complementary tests shall be done according to the requirements of Annex 4 to ensure that in use there is no excessive change in photometric performance.

       5.7. Conformity with the requirements of Paragraphs 5.2 to 5.5 shall be verified visually and, where necessary, by a test fitting.

       5.8  If the lens of the headlamp is of plastic material, tests shall be done according to the requirements of Annex 7.

       6.  ILLUMINATION

       6.1. Headlamps shall be so made that with suitable R2 and/or HS1 filament lamp(s) they provide adequate illumination without dazzle in the case of passing beam and good illumination in the case of the driving beam.

       6.1.1. The illumination produced by the headlamp shall be checked on a vertical screen set at a distance of 25 m in front of the headlamp and at right angles to its axis (see annex 6).

       6.1.2. The headlamp shall be checked by means of (a) standard (etalon) filament lamp(s) designed for a rated voltage of 12 V, any selective-yellow filters [6/] being replaced by geometrically identical uncoloured filters