Your low beam lights should be used when following a car by what distance?
in ON Canada it's 150 meters
Your low beam lights should be on when driving after sunset (twilight) and when it is raining. Some states require headlights or daytime running lights to be on in various conditions or at various times. You should not use your high-beam lights when you are closely behind another vehicle, or when approaching another vehicle head-on on a two-way road.
High beams should be used only when there is no oncoming traffic, fog, snow or heavy rain. The reason for oncoming traffic is obvious - you don't want your lights to cause glare or vision problems for the oncoming drivers. But the reasons for using low beam in fog, snow and heavy rain is because when your lights are on low beam, they are directed downward toward the road, and not directed towards the distance…
If your full beam doesn't stay on, make sure your light switch on the console is actually turned to "on". Unless you've had the daytime running lights disabled, then the lights will be on when switched "off" (!) and this means the full beam doesn't lock on, it only does "flash" mode. When the lights are switched "on", then the full beam should stay on.