Finally a good solution for better visibility with classic Volkswagens without having to buy new headlights. The principle is very simple, replace your old Duplo lamp by an H4 lamp and in a few minutes, the light output is considerably improved.
These special H4 bulbs have a mounting base equal to that of the Duplo (P45t) and can therefore be mounted in a Duplo type headlamp. The difference in brightness is very large, but slightly less than that obtained with a new unit specially designed for H4 lighting.
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