Document ID: chunk:federal_register_of_legislation:F2023C00228:reg:8:p1
Version: federal_register_of_legislation:F2023C00228
Segment Type: reg
Provision Reference: reg 8 (pt 1/7)
Character Range: 575416–579680

8                  0                                                         0                                     -        1.92
Line 11            2.00 D                                                    9 L to 9 R                            1.6      -
Line 12            7.00 U                                                    10 L to 10 R                          -        0.3; but 0.96 if within 2 cone
Line 13            10.00 U                                                   10 L to 10 R                          -        0.15; but 0.64 if within 2 cone
Line 14            10 U to 90 U                                              0                                     -        0.15; but 0.64 if within 2 cone
15*                4.00 U                                                    8.0 L                                 0.1*     1.08
16*                4.00 U                                                    0                                     0.1*     1.08
17*                4.00 U                                                    8.0 R                                 0.1*     1.08
18*                2.00 U                                                    4.0 L                                 0.2*     1.08
19*                2.00 U                                                    0                                     0.2*     1.08
20*                2.00 U                                                    4.0 R                                 0.2*     1.08
21*                0                                                         8.0 L & 8.0 R                         0.1*     -
22*                0                                                         4.0 L & 4.0 R                         0.2*     1.08
Zone 1             1U/8L-4U/8L-4U/8R-1U/8R-0/4R-0/1R-0.6U/0-0/1L-0/4L-1U/8L  -                                     1.08
Zone 2             4U to 10 U                                              10 L to 10 R                          -        0.3; but 0.96 if
                                                                                                                            within 2 cone
Zone 3             10 U to 90 U                                              10 L to 10 R                          -        0.15; but 0.64 if
                                                                                                                            within 2 cone

Notes:
"D" means under the H-H line.
"U" means above the H-H line.
"R" means right of the V-V line.
"L" means left of the V-V line.

         * During measurement of these points, the front position lamp approved to Regulation No. 50; if combined, grouped, or reciprocally incorporated-shall be switched on.
         ** 0.25 tolerance allowed independently at each test point for photometry unless indicated otherwise.

       Other general text:

            ECE type approval at reference luminous flux according to Regulation No. 37 or at objective luminous flux for gas-discharge light sources according to Regulation No. 99.

           Nominal aim for photometry:
             Vertical: 1 per cent D (0.57D) Horizontal: 0
           Allowed tolerances for photometry:
             Vertical: 0.3D to 0.8D Horizontal:  0.5D L-R

       6.2.6. The light shall be as evenly distributed as possible within zones 1, 2, and 3 for Class C or D headlamps.

       6.3. Provisions concerning driving beams

       6.3.1. In the case of a headlamp designed to provide a driving beam and a passing beam, measurements of the illumination produced on the screen by the driving beam shall be taken with the same headlamp alignment as applied to the condition of paragraphs 6.2. above; in the case of a headlamp providing a driving beam only, it shall be so adjusted that the area of maximum illumination is centred on the point of intersection of lines H-H and V-V; such a headlamp need meet only the requirements referred to in paragraph 6.3.

       6.3.2. Except for Class A headlamp, the illumination produced on the screen by the driving beam shall meet the following requirements:

       6.3.2.1. The point of intersection (HV) of lines H-H and V-V shall be situated within the isolux 80 per cent of maximum illumination.