Document ID: chunk:federal_register_of_legislation:F2023C00143:reg:25:p8
Version: federal_register_of_legislation:F2023C00143
Segment Type: reg
Provision Reference: reg 25 (pt 8/14)
Character Range: 41405–44834

and V = 0 degrees corresponds to the reference axis.  (On the vehicle it is horizontal, parallel to the median longitudinal plane of the vehicle and oriented in the required direction of visibility.)  It passes through the centre of reference. The values shown in the table give, for the various directions of measurement, the minimum intensities as a percentage of the minimum required in the axis for each light (in the direction H = 0 degrees and V = 0 degrees).

       2.2. Within the field of light distribution of paragraph 2, schematically shown as a grid, the light pattern should be substantially uniform, i.e. the light intensity in each direction of a part of the field formed by the grid lines shall meet at least the lowest minimum value being shown on the grid lines surrounding the questioned direction as a percentage.

       3. Photometric measurement of lamps equipped with several light sources

       The photometric performance shall be checked:

       3.1. For non-replaceable light sources (filament lamps and other):

       with the light sources present in the lamp, in accordance with paragraph 7.1.1 of this Regulation.

       3.2. For replaceable filament lamps:

       when equipped with mass production filament lamps at 6.75 V, 13.5 V or 28.0 V the luminous intensity values produced shall lie between the maximum limit given in this Regulation  and  the  minimum  limit  of  this  Regulation  increased  according  to  the permissible deviation of the luminous flux permitted for the type of filament lamp chosen, as stated in Regulation No. 37 for production filament lamps; alternatively a standard filament lamp may be used in turn, in each of the individual positions, operated at its reference flux, the individual measurements in each position being added together.

       Annex 5

       COLOURS OF LIGHTS

       TRICHROMATIC CO-ORDINATES

RED                           Limit towards  yellow  y        < 0.335
                                             purple  z        < 0.008
WHITE                         Limit towards  blue    x        > 0.310
                                             yellow  x        < 0.500
                                             green   y        < 0.150 + 0.640x
                                             green   y        < 0.440
                                             purple  y        > 0.050 + 0.750x
                                             red     y        > 0.382
SELECTIVE YELLOW              Limit towards  red     y        < 0.138 + 0.580x
                                             green   y        < 1.29x - 0.100
                                             white   y        >-x+ 0.966
Limit towards spectral value                 y       + 0.992

For checking these colorimetric characteristics, a source of light at a colour temperature of 2,856K corresponding to illuminant A of the International Commission on Illumination (CIE) shall be used.  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 lamps, in accordance with paragraph 7.1.1 of this Regulation.

       Annex 6

MINIMUM REQUIREMENTS FOR CONFORMITY OF PRODUCTION CONTROL PROCEDURES

       1. GENERAL

       1.1. The conformity requirements shall be considered satisfied from a mechanical and geometric standpoint, if the