I can understand your curiosity, but be extremely happy that you are not subjected to driving a car that has had it's headlights subjected to the insane US headlight laws. They have finally gotten them straightened out now, but for years, we found ourselves squinting at night. The 124 lights were the absolute worse.
Daytime running lights were mandated in Canada many years ago, and are becoming popular in the US. I'm afraid we may see the day where they are mandated in the US as well. Some government study or another determined that they would cut down on accidents. If there comes a day when I can't see a car coming during broad daylight, I will stop driving to protect myself and others around me.
The government just tries to get deeper and deeper into our lives by such mandates.
Have a great day,