The discussion on lights reminds me of a conversation I had with a German TUV tech about ten years ago. (TUV is their rigorous inspection process. I was suffering through it with an at that time 14 year old Ford Transit van. The van had a four cylinder diesel motor by the way.)
So,the guy was very strict about all lights, plus headlight alignment, plus emergency flashers. I thought he was being too strict. He explained to me that in Germany, compared to Georgia, where I'm from, they are driving faster, in less daylight hours, with frequent fog and mist.
Traffic blockages under these conditions are pretty dangerous, and good lights become a critical safety factor.
This made sense to me and since then I've even wondered why we don't adopt the German standards on automobile lighting.