Document ID: chunk:federal_register_of_legislation:F2023C00142:reg:21:p7
Version: federal_register_of_legislation:F2023C00142
Segment Type: reg
Provision Reference: reg 21 (pt 7/15)
Character Range: 50863–53770

number 30), designed for both traffic systems and approved in the Netherlands in accordance with the requirements of this Regulation in its original form, which is reciprocally incorporated with the same front position lamp as above,

Or: even either of the above-mentioned headlamps approved as a single lamp.

The main body of the headlamp shall bear the only valid approval number, for instance:

       Figure 11 (continued)

       Example 2

The above example corresponds to the marking of a lens of plastic material and used in an assembly of two headlamps approved in the Netherlands (E4) under approval number 81151, consisting of:

a headlamp emitting a halogen passing beam designed for both traffic systems and a halogen driving beam with a maximum luminous intensity between x and y candelas, meeting the requirements of Regulation No. 8 and,

a headlamp emitting a gas discharge driving beam with a maximum luminous intensity comprised between w and z candelas, meeting the requirements of this Regulation in its original form, the maximum luminous intensities of the driving beam contributors as a whole being comprised between 86,250 and 101,250 candelas as shown by the number 30.

Annex 3

Figure A:  Measuring screen 1

       Figure B:  Measuring screen 2

       Figure C: Measuring points for illumination values

Annex 4

TESTS FOR STABILITY OF PHOTOMETRIC PERFORMANCE OF HEADLAMPS IN OPERATION

TEST ON COMPLETE HEADLAMPS

Once the photometric values have been measured according to the prescriptions of this Regulation, in the point for Emax for driving beam and in points HV, 50 R and B 50 L for passing beam (or HV, 50 L, B 50 R for headlamps designed for left-hand traffic) a complete headlamp sample shall be tested for stability of photometric performance in operation.  "Complete headlamp" shall be understood to mean the complete lamp itself including ballast(s) and those surrounding body parts and lamps which could influence its thermal dissipation.

         1.              TEST OF STABILITY OF PHOTOMETRIC PERFORMANCE
         The tests shall be carried out in a dry and still atmosphere at an ambient temperature of 23 degrees C + 5 degrees C, the complete headlamp being mounted on a base representing the correct installation on the vehicle.
         1.1. Clean headlamp
         The headlamp shall be operated for 12 hours as described in subparagraph 1.1.1. and checked as prescribed in subparagraph 1.1.2.
         1.1.1. Test procedure
         The headlamp shall be operated for a period according to the specified time, so that

          1.1.1.1.

              (a) In the case where only one lighting function (driving or passing beam) is to be approved, the corresponding light source is lit for the prescribed time 1/
              (b) In the case of a reciprocally incorporated passing beam lamp and driving beam lamp or in the case of a reciprocally