Document ID: chunk:federal_register_of_legislation:F2023C00228:front:0:p75
Version: federal_register_of_legislation:F2023C00228
Segment Type: other
Provision Reference: 
Character Range: 201649–204958

voltage (in V) for measurement  Light flux (in lumens)
H               12                                                 1,150
H2              12                                                 1,300
H3              12                                                 1,100
HB3             12                                                 1,300
HB4             12                                                 825
H7              12                                                 1,100
H8              12                                                 600
HIR1            12                                                 1,840
HIR2            12                                                 1,355
H9              12                                                 1,500

       The headlamp shall be deemed satisfactory if the photometric requirements are met with at least one standard (reference) 12V filament lamp which may be supplied with the headlamp.

       6.1.4. The dimensions determining the position of the filament inside the standard filament lamp are shown on the relevant data sheet of Regulation No. 37.

       6.1.5. The bulb of the standard filament lamp must be of such optical shape and quality that it does not cause any reflection or refraction adversely affecting the light distribution. Compliance with this requirement must be checked by measuring the light distribution obtained when a standard headlamp is fitted with the standard (reference) filament lamp.

       6.2. Provisions regarding passing beams

       6.2.1. The passing beam must produce a sufficiently sharp "cut-off" to permit satisfactory adjustment with its aid.  The "cut-off" must be a horizontal straight line on the side opposite to the direction of traffic for which the headlamp is intended; on the other side it must extend neither beyond the broken line HV H1 H4 formed by a straight line HV H1 standing at an angle of 45 degrees to the horizontal and a straight line H1 H4 lying 25cm above the straight line hh, nor beyond the straight line HV H3, inclined at an angle of 15 degrees above the horizontal (see Annex 4).  A "cut-off" extending beyond both line HV H2 and line H2 H4 and resulting from a combination of the above two   possibilities shall in no circumstances be permitted.

       6.2.2. The headlamp shall be so aimed that:

       6.2.2.1. in the case of headlamps designed to meet the requirements of right-hand traffic, the "cut-off" on the left half of the screen [11/] is horizontal and, in the case of headlamps designed to meet the requirements of left-hand traffic, the "cut-off" on the right half of the screen is horizontal;

       6.2.2.2. this horizontal part of the "cut-off" is situated on the screen 25cm below the line hh (see Annex 4);

       6.2.2.3. the "elbow" of the "cut-off" is on line vv. [12/]

       6.2.3. When so aimed, the headlamp need, if its approval is sought solely for a passing beam,[13/] comply only with the requirements referred to in paragraphs 6.2.5. to 6.2.7.    below; if it is intended to provide both a passing beam and a driving beam it shall comply with the requirements referred to in paragraphs 6.2.5. to 6.2.7. and 6.3.

       6.2.4. Where a headlamp so aimed does not meet the requirements referred to in paragraphs 6.2.5.