Document ID: chunk:federal_register_of_legislation:F2023C00155:body:0:p11
Version: federal_register_of_legislation:F2023C00155
Segment Type: other
Provision Reference: 
Character Range: 28426–31685

a grid, the light pattern should be substantially uniform so that the light intensity in each direction of a part of the field formed by the grid lines meets at least the lowest minimum percentage value being shown on the grid lines surrounding the questioned direction.

       3. Photometric measurement of lamps equipped with several light sources

       The photometric performance shall be checked:

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

       at the voltage prescribed by the manufacturer; the test laboratory may require from the manufacturer the special power supply needed to supply such lamps;

       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 LAMPS TRICHROMATIC CO-ORDINATES

Red:                              limit towards yellow  y <             0.335
limit towards purple              z <                   0.008
White:                            limit towards blue    x >             0.310
limit towards yellow              x <                   0.500
limit towards green               y <                   0.150 + 0.640x
limit towards green               y <                   0.440
limit towards purple              y >                   0.050 + 0.750x
limit towards red                 y >                   0.382
Amber:                            limit towards yellow  y <             0.429
limit towards red                 y >                   0.398
limit towards white               z <                   0.007
Selective yellow[*/]              limit towards red     y >             0.138 + 0.580x
limit towards green               y <                   1.29x – 0.100
limit towards white               y >                   -x + 0.966
limit towards the spectral value  y <                   -x + 0.992

For verifying the limits above, a source of light at a colour temperature of 2856 K (illuminant A of the International Commission on Illumination (CIE)), in combination with appropriate filters, may be used. However, for lamps equipped with non-replaceable light sources, the colorimetric characteristics should be verified with the light sources present in the lamps at a voltage of 6.75 V, 13.5 V or 28.0 V.

Annex 6

PHOTOMETRIC MEASUREMENTS FOR THE REAR-REGISTRATION-PLATE ILLUMINATING DEVICE

       1. Space to be illuminated

       The devices can be of category 1 or 2.  The devices of category 1 shall be designed to illuminate a space of at least 130 x 240 mm, the devices of category 2 a space of at least 200 x 280 mm.

       2. Colour of the Light

       The light of the illuminating device shall be sufficiently colourless in