I was under the impression that most car headlights used halogen bulbs nowadays, as opposed to tungsten. Is this correct?

I own a car but I mainly ride my motorcycle. While learning to ride a motorcycle I took a Motorcycle Safety Foundation course where they advised us to drive with our main beam headlight on during the day-time to increase visiblity. The idea is to make it easier for inattentive car drivers to see you. I use dipped beam around town at night, of course, but, irrespective of ambient light levels, I'll keep my main beam on in the afternoon/evening until I see a sufficient number of cars with their headlights on.

What I really object to is people who don't use headlights when it's dark, but rely on parking lamps and fog lamps instead. Can't the police fine you for this? Why don't they?