Dan, it'd cost you about 33 bones or so right here in the US on eBay. Average halogen bulbs are 50/55W, so these would be a HUGE improvement.

H1 would work with a H1 conversion for something with dual headlights like an old Apache. Gotta have H4 for singles tho, and interestingly enough there's a set of 85/80 watt H4 by OSRAM right here on eBay as well, those would work great in a set of 7" round H4 conversion bulbs, on eBay as well

1956 GMC 370 dump " 'Tater "
1970 VW Volksrod "the Black Bomber"
2007 Chevy Avalanche
2020 Jeep Cherokee Trailhawk,
2005 Harley Davidson FLHTCUI

I dig all cars, old and new, whether they were hammered out of American iron, German steel, or Japanese tin cans. Being unable to appreciate them all is missing out on a world of great things.
But thats just MY opinion! :P