Document ID: chunk:federal_register_of_legislation:F2021C00467:body:0:p7
Version: federal_register_of_legislation:F2021C00467
Segment Type: other
Provision Reference: 
Character Range: 18337–21185

and/or Regulation No. 128 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.
5.4.2.                              The design of the device shall be such that the light source can be fixed in no other position but the correct one.
5.4.3.                              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.
6.                                          Intensity of light emitted
6.1.                                    The intensity of light emitted by each of two samples shall be not less than the minimum intensity and not greater than the maximum intensity specified in paragraphs 6.2. and 6.3. The intensity shall be measured in relation to the axis of reference in the directions shown below (expressed in degrees of angle with the axis of reference). Test points are given for a lamp mounted on the left side of the vehicle, the L designations become R designations for a lamp mounted on the right side of the vehicle.
6.2.                                    For the left-hand device, the minimum intensity of the light at the specified measuring points shall be as follows:
(1) 2.5D – 30L: 240 cd
(2) 2.5D – 45L:  400 cd
(3) 2.5D – 60L: 240 cd
The same values apply symmetrically for a right-hand device. (Shown in Annex 3)
6.3.                                    The intensity of the light emitted in all directions shall not exceed:
(a)  300 cd above the 1.0U, L and R line;
(b)  600 cd between the horizontal plane and the 1.0U, L and R Line; and
(c)  14,000 cd below the 0.57 D, L and R line.
6.4.                                    In the case of a single lamp containing more than one light source, the lamp shall comply with the minimum intensity required when any one light source has failed and when all light sources are illuminated the maximum intensities shall not be exceeded.
7.                                          Test procedure
7.1.                                    In the case of a lamp with replaceable light source, when not supplied by an electronic light source control gear, with an uncoloured or coloured standard light source of the category prescribed for the device, supplied with the voltage:
             (a) In the case of filament lamp(s), that is necessary to produce the reference luminous flux required for that category of filament lamp,
             (b) In the case of LED light sources of 6.75 V, 13.5 V or 28.0 V; the luminous flux value produced shall be corrected. The correction factor is the ratio between the objective luminous flux and the