Document ID: chunk:federal_register_of_legislation:F2023C00156:body:0:p5
Version: federal_register_of_legislation:F2023C00156
Segment Type: other
Provision Reference: 
Character Range: 12339–15114

incorporated lamps covered by this Regulation.

       4.6.5. The approval marking shall be clearly legible and indelible.  It may be placed on an inner or outer part (transparent or not) of the device which cannot be separated from the transparent part of the device emitting the light.  In any case the marking shall be visible when the device is fitted on the vehicle or when a movable part such as the hood or boot lid or a door is opened.

       4.7. Annex 1 gives examples of arrangements of approval marks for a single lamp (figure 1) and for grouped, combined or reciprocally incorporated lamps (figure 2) with all the additional symbols referred to above.

       5. GENERAL SPECIFICATIONS

       5.1. Each sample shall conform to the lighting specifications set forth in paragraph 9 below[3/].

       Illuminating devices must be so designed that the entire surface to be illuminated is visible from the rear within the field of vision indicated in the drawing in Annex 4.

       5.2. All measurements shall be carried out by adjusting the lamp or lamps of the illuminating device to the minimum light flux prescribed for the test voltage in the specification of the lamp or lamps for the device.

       5.2.1. All measurements on lamps equipped with non-replaceable light sources (filament lamps and other) shall be made at 6.75 V, 13.5 V or 28.0 V respectively.

       In the case of light sources supplied by a special power supply, the above test voltages shall be applied to the input terminals of that power supply.  The test laboratory may require from the manufacturer the special power needed to supply the light sources.

       5.3. For any rear registration plate illuminating device, except those equipped with filament lamp(s), the luminance values measured after one minute and after 30 minutes of operation shall comply with the minimum requirements.

       The luminance distribution after one minute of operation can be calculated by applying at each test point the ratio of luminance values measured in one point after one minute and after 30 minutes of operation.

       6. COLOUR OF LIGHT

       The light of the lamp used in the illuminating device must be sufficiently colourless not to cause any appreciable change in the colour of the registration plate.

       7. ANGLE OF INCIDENCE

       The manufacturer of the illuminating device shall specify the position in which the device is to be fitted in relation to the space for the registration plate; the device must be so placed that the angle of incidence of the light on the surface of the plate does not exceed 82 degrees  at any point on the surface to be illuminated, this angle being measured from the extremity of the device's illuminating area which is furthest from the