If I'm not mistaken (I'm trying to remember), H1 bulbs are generally used for fog lights, less bright but more focused. H7's are used as fogs in some cars, but usually are for high/low beams. Most 3-series bmws use the 9005 and 9006 for high beams and low beams (respectively). As for which is brighter, probably the H7, but that may not be the only thing you should look at, depending on your application.
Originally posted by El Presidente@Aug 3 2004, 04:33 PM Although I have heard H1 is brighter, I have never understood why. Both are generally 55W, have the same amp draw, and therefore should produce the same lumens.
I was googling around for bulbs the other day and found H1 bulbs only come in 55w, while H7 bulbs come in 55w and 80w variations. Could that have anything to do with it?
Originally posted by komodo9@Aug 3 2004, 04:38 PM I was googling around for bulbs the other day and found H1 bulbs only come in 55w, while H7 bulbs come in 55w and 80w variations. Could that have anything to do with it?
It may not be the bulbs, as H1s are used in the BMW fogs I think and 9006s are NA spec headlights. Its the Euro spec Ellipsoids that can use H1 and H7 bulbs. So I think it is the type of light fixture that helps to make the bulb brighter.
__________________ 1996 318i
5 Speed Manual
Alpine CDA-7895 Head Unit
12" Alpine Type-R, sealed box
Pioneer 400w amp for $20 at a yard sale (to replace my fried MRV-1507)
Infinity Kappa 4" 2-way speakers(rear)
Infinity Kappa 5.25" component speakers(front)
Debaffled airbox, K&N filter
Tracked Mud on carpets
Shampooed and cleaned carpets
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