dnudelman
True Classic
that would depend on the wattage of your bulb vs wattage of your sealed beam. Typical H4 bulbs are 60 watts but I've seen 90+ for sale.that's as good a place to start as any As long as they don't create more heat or melt the existing wiring, it's all good....
Your sealed beam headlights were set to a 1950's standard to use headlight aiming machines that Gas stations had at the time. Headlamps with H4 bulbs (not sealed) we outlawed in the USA until Gov. Dixie Lee Ray made them legal in the state of Washington. She was the last intelligent and honest politician in Washington State. She was a nuclear scientist.
Cibie of France designed the Z beam to give you a light pattern that was brighter where you would need it and not in the eyes of the oncoming traffic.
Hella of Germany, Carello in Italy and PIAA in Japan made such lights for the aftermarket in the USA and were OEM in Europe.
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