Several decent H4 lamp options.
Hella "Vision Plus" 7" round lamp. These can be aimed with the mechanical aimer like any standard US car lamp until the 90s.
Cibie 7" H4 lamp (left hand drive). Either buy in EU via any of your personal connections or through one of the few US sellers.
1. Daniel Stern
2.
Headlight Services - Headlamps
Bosche made a 7" round for LHD that was supposed to be decent. Don't know if its still available in the USA.
If you find a cheap copy, its probably just that. I find searching Candlepower Forums for headlight info usually turns up some solid information.
If you are considering a different Hella lamp, the motorcycle approved ones sold here have too much beam seperation between hi/lo for most situations. That particular one is not so good for our cars.
For bulbs, the better manufacturers have versions that produce more light, same power draw, at the expense of shorter life.
These are labelled +15, +30, +50 The Narva's I have were called Rangepower but they now have a new name.
