Rules of the Road

In BC, headlights must be used:

British Columbia road sign — From one-half hour before sunset to one-half hour after sunrise, and when visibility is poor
Show Answer & Explanation
Correct Answer: B. From one-half hour before sunset to one-half hour after sunrise, and when visibility is poor

The half-hour window covers dawn/dusk when the eye adapts slowest. Daytime running lights do not satisfy this rule because they typically do not include tail lights.