Your parking lights can be used at anytime (many new cars have daytime running lights), however, parking lights can not be used as a substitute for highlights. So if highlights are required than you can't have just your parking lights.
I like to use my parking lights when I'm in my car parked waiting for someone to get in, I do this becuase at night sometime my headlights are pointed at someones house or into the road. With the parking lights on and not the headlights it's less distracting for others.
2 answers
Your parking lights can be used at anytime (many new cars have daytime running lights), however, parking lights can not be used as a substitute for highlights. So if highlights are required than you can't have just your parking lights.
I like to use my parking lights when I'm in my car parked waiting for someone to get in, I do this becuase at night sometime my headlights are pointed at someones house or into the road. With the parking lights on and not the headlights it's less distracting for others.