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Reply to "H4 Headlights - Again"

Sacto Mitch posted:

 

Thanks for the links, guys.

My lights are already wired through relays, so I'm good to go.

But I'm still wondering about this whole P45t and P43t thing (which turns out to mean that some sockets (and presumably some bulb bases) are 43 mm diameter and some are 45 mm.

So, if I get a gen-u-whine German Hella lamp, do I have to search for gen-u-whine German bulbs to fit it? The garden variety Hella lamps are supposedly made in Mexico or other places where they don't speak German.

I went over to my friendly local NAPA store today. They had at least four different flavors of H4 bulbs in the same physical size and wattage. They were all 60/55 watt bulbs at different price points, supposedly offering better brightness as the price rose.

But nowhere on any of the packaging was anything said about P45t or P43t. So is there just one Amurican sized H4 bulb that I need to worry about? I'd like to be able to get bulbs at any FLAPS.

I think I'll just order the cheapie Hella lamps from Amazon and hope that bulbs from NAPA fit.

 

I found H4 bulbs at Walmart with the three tab base at $8.37 a bulb, they are packaged as Sylvania but are actually Osrams out of Germany.

 

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