My German Market 230SL has the "fishbowl" headlights. I can tell you while looking terrific, they are not very good, almost useless for visibility. (I use the driving lights to augment)
It has been on "my list" for years to try to update to something better bulb-wise, but the idea only raises to the top of the list after driving at night, which is almost nil.
I really need guidance to follow on "how to..."
JB