[legion]

On all of the vehicles I own (and have owned) with fog lights (driving lights, actually), I turn them on with the headlights. In my case, the foglights always pointed down at a greater angle than the headlights. They fill in the area between where the headlights hit the ground and the front of the car. They also have always had a wider projection than the headlights close to the car, allowing me to see curbs and road lines much clearer when parking.

My old 300D had true, amber-colored fog lights. I only used those in fog.