tried substituting H9 bulbs in foglights ?
#1
AudiWorld Senior Member
Thread Starter
tried substituting H9 bulbs in foglights ?
I read that the H9 bulb base will fit in an H11 socket. The H9 has almost double the lumens output of the H11 but draws only 65W (as compared to the H11 55W). Seems like a good thing to do...anyone know a reason not to swap?
#2
AudiWorld Super User
Not a direct swap - base is similar but not identical but the connector is different. It may be possible to modify the plug on the bulb though to fit without altering the cars wiring.
I am not sure why you would want brighter fog lamps though - the brighter they are, generally they will be worse in thick fog and there is no other time or reason for using them.
If you drive with them on when it is not foggy, they simply annoy other drivers and give the impression there is a teenager behind the wheel.
I am not sure why you would want brighter fog lamps though - the brighter they are, generally they will be worse in thick fog and there is no other time or reason for using them.
If you drive with them on when it is not foggy, they simply annoy other drivers and give the impression there is a teenager behind the wheel.
#3
+1
I wear bi-focal contacts, and It causes one hell of a "starburst" in my vision because of the contacts. The people who drive around with them on just to say "look-my car has foglights" really annoy me.
Ken
I wear bi-focal contacts, and It causes one hell of a "starburst" in my vision because of the contacts. The people who drive around with them on just to say "look-my car has foglights" really annoy me.
Ken
#4
AudiWorld Senior Member
Thread Starter
here's my logic on the matter...
Not a direct swap - base is similar but not identical but the connector is different. It may be possible to modify the plug on the bulb though to fit without altering the cars wiring.
I am not sure why you would want brighter fog lamps though - the brighter they are, generally they will be worse in thick fog and there is no other time or reason for using them.
If you drive with them on when it is not foggy, they simply annoy other drivers and give the impression there is a teenager behind the wheel.
I am not sure why you would want brighter fog lamps though - the brighter they are, generally they will be worse in thick fog and there is no other time or reason for using them.
If you drive with them on when it is not foggy, they simply annoy other drivers and give the impression there is a teenager behind the wheel.
I am going to try a set of yellow H9s. Since they are normally used as a lowbeam bulb their output (even with the reduction caused by the yellow filtration) should provide enough light to see the road. And I should think that Audi has enough of a cushion in the currrent handling hardware to handle the extra 20% wattage. I'll post results.
I am going to try the
#5
AudiWorld Super User
I ssupect the power supply will be adequate for the extra wattage involved.
The main reason the fog lights do not provide adequate light for driving by themselves is due to lens design rather than the output from the H11's. Within a reasonable tollerance, the light output from a standard 55w halogen bulb will be same so an H1 for instance, can provide plenty of light in a standard parabolic reflector, for high beam night driving. I am not sure how much extra light you will actually benefit from but it will be interesting to find out how it goes. At least it is a very cheap mod.
The main reason the fog lights do not provide adequate light for driving by themselves is due to lens design rather than the output from the H11's. Within a reasonable tollerance, the light output from a standard 55w halogen bulb will be same so an H1 for instance, can provide plenty of light in a standard parabolic reflector, for high beam night driving. I am not sure how much extra light you will actually benefit from but it will be interesting to find out how it goes. At least it is a very cheap mod.
#6
AudiWorld Member
https://www.audiworld.com/forums/showthread.php?p=24054894#post24054894
Good luck in your Venture! Laters,
"Edit" I tried the H7 Osram Bulb, so I have no Idea on the H9 to H11 Compatability! Disregard!
Last edited by williebone; 03-01-2011 at 05:35 AM.
#7
AudiWorld Senior Member
Thread Starter
1300 lumens for H11 bulb, 2100 lumens for H9 bulb
I ssupect the power supply will be adequate for the extra wattage involved.
The main reason the fog lights do not provide adequate light for driving by themselves is due to lens design rather than the output from the H11's. Within a reasonable tollerance, the light output from a standard 55w halogen bulb will be same so an H1 for instance, can provide plenty of light in a standard parabolic reflector, for high beam night driving. I am not sure how much extra light you will actually benefit from but it will be interesting to find out how it goes. At least it is a very cheap mod.
The main reason the fog lights do not provide adequate light for driving by themselves is due to lens design rather than the output from the H11's. Within a reasonable tollerance, the light output from a standard 55w halogen bulb will be same so an H1 for instance, can provide plenty of light in a standard parabolic reflector, for high beam night driving. I am not sure how much extra light you will actually benefit from but it will be interesting to find out how it goes. At least it is a very cheap mod.
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#8
AudiWorld Senior Member
Thread Starter
If you have the H7 socket Osram makes a bulb that ...
I tried this with Osram Super Ralley (65w) and had to return them because Base was not compatible. I was Very Disapointed only because the Parts Department gave me the Wrong Bulb Style. I understand that you are trying to get more Output, but the only way to do that with out Hacking Up an A8's wiring is to go HID. Your Output will be higher and Truer in Color. You can Plug and Play without Changing anything and you can use a 35w or 55 Setup with a Very Slim Ballast either Zip Tied or Velcroded. I would suggest 3000K which is Pure Yellow and DDMTuning has Lifetime Waranty. Here is the Link to the Thread:
https://www.audiworld.com/forums/showthread.php?p=24054894#post24054894
Good luck in your Venture! Laters,
"Edit" I tried the H7 Osram Bulb, so I have no Idea on the H9 to H11 Compatability! Disregard!
https://www.audiworld.com/forums/showthread.php?p=24054894#post24054894
Good luck in your Venture! Laters,
"Edit" I tried the H7 Osram Bulb, so I have no Idea on the H9 to H11 Compatability! Disregard!
#9
AudiWorld Member
The '04-'05 A8 has the H11 Base, so I took the HID route and 5000k is White which is a good match to the Factory 4300K Headlamps. I have a set of 6000K, but may send them back for the a set of 4300K just to add a Hint of Yellow. Overall the HID compared to the OEM Halogens Fogs are Day and Night in difference. I'm very curious as to the Outcome of your Experiment so let us know how it turns out and send some pics. Take care and laters,