Here in rural Oregon--where bicyclists "share the road" with "heavy metal" vehicles weighing thousands of pounds, particularly down roads without a posted speed limit...majority of us drive with our lights on.
Seems most cyclists wear rear view mirrors and will scoot to the right shoulder--if they see you. Then sometimes, there are those that will challenge their 100 lb bike frame with the metal of a 6000 lb truck and not budge an inch.
What's this have to do with running light? Most cyclists on the rural roads have "running lights" (front and back) and are seen well advance; those that don't--hard to see em at dusk. (Someone will be the windshield and someone will be the bug).
When we lived in the burbs--the idea of driving with running or headlights on during daylight was a stupid idea, but here in the land of rural roads, driving with headlights on is a must. Safety first.