Document ID: chunk:federal_register_of_legislation:F2023C00141:reg:1:p1
Version: federal_register_of_legislation:F2023C00141
Segment Type: reg
Provision Reference: reg 1 (pt 1/14)
Character Range: 26262–29332

1  In addition, for red side-marker lamp, in the angular field from 60° to 90° in horizontal direction and  ±20° in vertical direction towards the front of the vehicle, the maximum intensity is limited to 0.25 cd.

7.1.4.  In the case of a lamp containing more than one light source:
         The lamp shall comply with the minimum intensity required when any one light source has failed;
         When all light sources are illuminated the maximum intensity specified may not be exceeded.
         All light sources which are connected in series are considered to be one light source.
7.2.                                    Outside the reference axis and within the angular fields defined in the diagrams in Annex 1 to this Regulation, the intensity of the light emitted by each of the two side-marker lamps supplied must:
7.2.1.                              In each direction corresponding to the points in the light distribution table reproduced in Annex 4 to this Regulation, be not less than the product of the minimum specified in paragraph 7.1. above by the percentage specified in the said table for the direction in question;
7.2.2.                              In no direction within the space from which the side-marker lamp is visible, exceed the maximum specified in paragraph 7.1. above;
7.2.3.                              The provisions of paragraph 2.2. of Annex 4 to this Regulation on local variations of intensity must be observed.
7.3.                                    Annex 4, to which reference is made in paragraph 7.2.1. above, gives particulars of the measurement methods to be used.
8.                                          Colour of light emitted
The colour of the light emitted inside the field of the light distribution grid defined at paragraph 2. of Annex 4 shall be amber. However it can be red, if the rearmost side-marker lamp is grouped or combined or reciprocally incorporated with the rear position lamp, the rear end-outline marker lamp, the rear fog lamp, the stop lamp, or is grouped with or has part of the light emitting surface in common with the rear retro-reflector. To check these colorimetric characteristics, the test procedure described in paragraph 9. of this Regulation shall be applied. Outside this field no sharp variation of colour shall be observed.
However, for lamps equipped with non-replaceable light sources (filament lamps and other), the colorimetric characteristics should be verified with the light sources present in the lamp, in accordance with relevant subparagraphs of paragraph 9.1. of this Regulation.
9.                                          Test procedure
9.1.                                    All measurements, photometric and colorimetric shall be carried out with an uncoloured or coloured standard light source of the category prescribed for the device, supplied with the voltage:
             (a) In the case of filament lamps, that is necessary to produce the reference luminous flux required for that category of filament lamp;
             (b) In the case of LED light sources