Document ID: chunk:federal_register_of_legislation:F2023C00228:front:0:p109
Version: federal_register_of_legislation:F2023C00228
Segment Type: other
Provision Reference: 
Character Range: 294508–297137

" 25 R
" 25 R                                     " 25 L
Any point in zone III                      < 0.7
Any point in zone IV                       > 3
Any point in zone I < 2 x (E50R or E50L)*  < 2 x (E50R or E50L)*

* E50R and E50L are the illuminations actually measured.

       6.2.6. There shall be no lateral variations detrimental to good visibility in any of the zones I, II, III and IV.

       6.2.7. The illumination values in zones "A" and "B"[*/] as shown in Figure C in annex 3 shall be checked by the measurement of the photometric values of points 1 to 8 on this figure; these values shall lie within the following limits:

       1 + 2 + 3 > 0.3 lux, and

       4 + 5 + 6 > 0.6 lux, and

       0.7 lux > 7 > 0.1 lux and

       0.7 lux > 8 > 0.2 lux

       These new values shall not be required for headlamps which have been approved before the application date of Supplement 3 to the 02 series of amendments to this Regulation (2 December 1992) nor to the extensions of such approvals.

       6.2.8. Headlamps designed to meet the requirements of both right-hand and left-hand traffic must, in each of the two setting positions of the optical unit or of the filament lamp, meet the requirements set forth above for the corresponding direction of traffic.

       6.3. Provisions concerning driving breams

       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 for measurements under paragraphs 6.2.5.  to 6.2.7. 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 hh and vv; such a headlamp need meet only the requirements referred to in paragraph 6.3.  Where more than one light source is used to provide the driving beam, the  combined  functions  shall  be  used  to  determine  the  maximum  value  of  the illumination (EM).

       6.3.2. 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 hh and vv shall be situated within the isolux 80% of maximum illumination. This maximum value (EM) shall not be less than 48 lux. The maximum value shall in no circumstances exceed 240 lux; in addition, in the case of a combined passing and driving headlamp, this maximum value shall not be more than 16 times the illumination measured for the passing beam at point 75 R (or 75 L).

       6.3.2.1.1. The maximum