When I first started driving incandescent headlights were the norm. In 1986 I bought my first new car, a Daytona. It had halogen bulbs and I thought they were the greatest things. Many years later, and many rides later, I got a set of Hella H4 housings for my daily drier, what a difference. Still halogens but with good optics, not your off the shelf mass produced good enough stuff like what I had been using since forever.
For the Cambridge I stepped up to good housings sporting LED bulbs.
The difference was similar to going from incandescent bulbs straight to the Hellas (skipping regular halogens).
I would venture to state that the head lights in my 51 are now as good as the headlights in my 2015 BMW.