Document ID: chunk:federal_register_of_legislation:F2023C00154:front:0:p16
Version: federal_register_of_legislation:F2023C00154
Segment Type: other
Provision Reference: 
Character Range: 39755–42674

shall be regulated to maintain 13.2 V for a 12 V system, or at the vehicle voltage as specified by the applicant, with a tolerance of ±0.1 V.
         The objective luminous flux of the gas-discharge light source may differ from that specified in Regulation No. 99. In this case, the luminous intensity values shall be corrected accordingly.
6.4.1.3. In the case of non-replaceable light sources:
All measurements on front fog lamps equipped with non-replaceable light sources shall be made at 6.3 V, 13.2 V or 28.0 V or at other vehicle voltage as specified by the applicant. The test laboratory may require from the applicant the special power supply needed to supply the light sources. The test voltages shall be applied to the input terminals of the lamp.
         6.4.1.4.  In the case of LED modules:

         All measurements on front fog lamps equipped with LED module(s) shall be made at 6.3 V, 13.2 V or 28.0 V respectively, if not otherwise specified within this Regulation. LED modules operated by an electronic light source control gear shall be measured with the input voltage as specified by the applicant or with a supply and operating device which replace this control gear for the photometric test. The relevant input parameters (e.g. duty cycle, frequency, pulse shape, peak voltage) shall be specified and stated in the communication form, item 10.6., in Annex 1 to this Regulation.

6.4.1.5. Compliance with the requirement in paragraph 5.9.1. of this Regulation shall be verified at least with respect to the values in line 3 and 4 of table in paragraph 6.4.3. below.
6.4.2. Photometric adjustment and measuring conditions
6.4.2.1. The aiming screen for visual adjustment (see Annex 4, paragraph 2.2.) shall be positioned at either a distance of 10 m or a distance of 25 m in front of the front fog lamp.
6.4.2.2. The beam shall produce on this aiming screen, over a width of not less than 5.0 degrees on both sides of the line v, a symmetrical and substantially horizontal cut-off to enable visual vertical adjustment. In the case that visual aim leads to problems or ambiguous positions, the measurement of the cut-off quality and the instrumental method as specified in paragraphs 4. and 5. of Annex 9 shall be applied.
6.4.2.3. The front fog lamp shall be adjusted so that the cut-off on the screen is 1° below the line h according to the requirements in paragraph 2. of Annex 9.
         6.4.3. Photometric requirements
         When so adjusted, the front fog lamp shall meet the photometric requirements in the table below (refer also to paragraph 2.2. of Annex 4 to this Regulation):

                                                                                              Vertical position*   Horizontal position*
                                                                                              above h +            left of v: -           Luminous intensity
Designated