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light matching requirements:

4, GB 4599-1994
4.2 light matching requirements:

1) near light: sufficient lighting and no glare; far light: good
Lighting;
2) the front 25m of the headlamp reference center;
3) near light should produce obvious bright and dark cutoff lines, horizontal parts
On the left side of the V-V line, the right is 15 degrees upward with the horizontal line.
A slanting line, or perpendicular to a 45 degree oblique line to a horizontal line
A line with a 25cm turning level.