VS - Lighting Systems - Lighting - 998542

8.2. Introduction to photometric specifications Photometric specifications set illumination levels required on the road by defining photometric points and zones in the driver’s field of view, from left to right at several distances. The amount of points depends on the light source; Xenon lamps offers a wider beam so more points are required to specify the Xenon headlamps illumination pattern. Point or zones are associated to illuminance value limits (min. or max.) or their intensity (in candela).

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80 m

25L

B50L

50V 50R

75R

25R

l 75R Located at 75 m on the low right side. The value must be near to the maximum illumination It is the eye visual comfort point. l 50R Range point located at 50 m from the projector on the right side. l 50V Range point located at 50 m of the projector on the vehicle vertical path.

l B50L Located at 50 m on the opposite driver glare trajectory (glare indication). l 25L and 25R Points located at 25 m from the projector on the far left and right edges. These two points give an indication on the beam width (low side road illumination).

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