Swapping OEM Xenon bulbs > 6000k HID bulbs - Page 2 - Audi A5 Forum & Audi S5 Forum
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post #31 of 33 Old 25th March 2015, 04:15 AM
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I'm not sure what the exact difference is but I switched to the Philips D3S xenon bulb and now it's way brighter than my stock xenons. In fact oncoming cars flash their brights on me all the time. My visibility is 100% better.

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post #32 of 33 Old 25th March 2015, 06:12 PM
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Interesting topic....been discussed before here. My experience has been that these bulbs degrade over time loosing some % of their intensity through filament degeneration as well as a film developing on the inside and outside of the glass enclosure.
When a bulb on my car blew last July I purchased a pair of standard 4300K white bulbs and at first only changed the failed bulb assembly. At night the new bulb was noticeably whiter and brighter than the other side with the older bulb. After removing the other bulb it was evident that there was a film on the glass on the outside. I wiped the glass and the film came off on a wet paper towel but there was some on the inside, too. Sure it was a contributor to the reduced brightness.
I purchased my bulbs from a website called Onyxlights.com which has all of the xenon intensities available. They state that the bulbs they sell are warrranted for a year / lifetime 3000+hours.
Just my experience

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post #33 of 33 Old 31st March 2015, 12:30 AM
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Originally Posted by Connecticut Yankee View Post
Interesting topic....been discussed before here. My experience has been that these bulbs degrade over time loosing some % of their intensity through filament degeneration as well as a film developing on the inside and outside of the glass enclosure.
When a bulb on my car blew last July I purchased a pair of standard 4300K white bulbs and at first only changed the failed bulb assembly. At night the new bulb was noticeably whiter and brighter than the other side with the older bulb. After removing the other bulb it was evident that there was a film on the glass on the outside. I wiped the glass and the film came off on a wet paper towel but there was some on the inside, too. Sure it was a contributor to the reduced brightness.
I purchased my bulbs from a website called Onyxlights.com which has all of the xenon intensities available. They state that the bulbs they sell are warrranted for a year / lifetime 3000+hours.
Just my experience
Had a look at their D3S bulbs, got a question for those in the know - the standard bulbs in my '09 A5 seem to be 35w (not as bright as my 55w conversion kit in my fiesta). If I bought the 55w D3S, would they be any brighter?

I thought that the balast is what dictates the wattage and intensity of the bulb in HIDs.

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