Document ID: chunk:federal_register_of_legislation:F2023C00140:body:0:p8
Version: federal_register_of_legislation:F2023C00140
Segment Type: other
Provision Reference: 
Character Range: 21956–24963

may be used, provided that no restriction on the use is made in Regulation No. 37 and its series of amendments in force at the time of application for type approval or in Regulation No. 128 and its series of amendments in force at the time of application for type approval.
6.5.2.                              The design of the daytime running lamp shall be such that the light sources can be fixed in no other position but the correct one.
6.5.3.                              The light source holder shall conform to the characteristics given in IEC Publication 60061. The holder data sheet relevant to the category of light source used, applies.
7.                                          Intensity of light
7.1.                                    The luminous intensity of the light emitted by each daytime running lamp shall not be less than 400 cd in the axis of reference.
7.2.                                    Outside the reference axis and within the angular fields defined in the arrangement diagram in Annex 6 to this Regulation, the intensity of the light emitted by each daytime running lamp shall:
7.2.1.                              In each direction corresponding to the points in the table of standard light distribution reproduced in Annex 3 to this Regulation, be not less than the minimum specified in paragraph 7.1. above, multiplied by the percentage specified in the said table of the direction in question, and
7.2.2.                              Not exceed 1,200 cd in any direction the daytime running lamp is visible.
7.3.                                    Moreover, throughout the field defined in the diagram in Annex 6, the intensity of the light emitted shall not be less than 1.0 cd.
7.4.                                    Light source failure
7.4.1.                              In the case of a daytime running lamp containing more than one light source, the daytime running lamp shall comply with the minimum intensity required and the maximum intensity shall not be exceeded.
7.4.2.                              In case of failure of any one light source in a single lamp containing more than one light source, one of the following provisions shall apply:
           (a)   The light intensity at the points of standard light distribution defined in Annex 3 to this Regulation shall be at least 80 per cent of the minimum intensity required, or
           (b)   The light intensity in the axis of reference shall be at least 50 per cent of the minimum intensity required, provided that a note in the communication form states that the lamp is only for use on a vehicle fitted with an operating tell-tale.
7.4.3.                              A group of light sources, wired so that the failure of any one of them causes all of them to stop emitting light, shall be considered to be one light source.
8.                                          Apparent surface
The area of the apparent surface in the direction of the axis of reference of the daytime running lamp shall