Now I've only been driving since I was 16 and I'm 64 2/3ds now. And I've had a motor turning wheels for me since I was about twelve. Was driving doing road trips pretty much since 16. It was never a flash of the high beams. Where I came from, it was Lights off-1-2- lights back on for night time and reverse, lights one-1-2 lights off, during the day.
just sayin'.
You're quite right. That's what I do at night. But since the advent of full time headlights, a flick of the beams or lights off/on during the day???