Fog lights are made for fog. They are mounted low to the ground, shine beneath the fog, to illuminate the road.
By DOT rules/laws, headlights have to be a certain distance above the road. Not to shine and blind the eyes of an on-coming driver. The local law officer can write you a ticket if there appears to be a problem.
If you have the stock 6 volt system, it sounds like you have too much voltage drop at connection points leading up too the headlights. Cleaning the corrosion off the contact points usually works. Many choose to add headlight relays. This works also. If you are running the original type incandescent sealed beams, the elements can age out and grow dim. Many choose to go with 6 volt halogen replacements. This works as well.
If you are driving a restored classic vehicle, I wouldn't risk driving at night. If you have a driver quality, I would go for the best upgrade solution.
Last edited by buoymaker; 11/26/2022 7:13 PM.
