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Thread: Philips vs sylvania h9?

  1. #1

    Default Philips vs sylvania h9?

    Any preference for either the Philips or Sylvania h9 bulb? Looking to upgrade the low-beams on a 2010 Prius from h11 to h9, which I understand is an acceptable modification because the Prius has projectors.

  2. #2
    Moderator Alaric Darconville's Avatar
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    Default Re: Philips vs sylvania h9?

    Quote Originally Posted by Ls400 View Post
    Any preference for either the Philips or Sylvania h9 bulb? Looking to upgrade the low-beams on a 2010 Prius from h11 to h9, which I understand is an acceptable modification because the Prius has projectors.
    You've created something like 12 threads in 3 weeks-- are you using the forum search before posting a question?

  3. #3

    Default Re: Philips vs sylvania h9?

    Yes, it seems that the last time various H9s were discussed was in 2011. http://www.candlepowerforums.com/vb/....x=0&sa.y=0And I read that H11 to H9 is only safe in projectors. If I had reflectors I wouldn't be asking.
    Last edited by Ls400; 10-04-2018 at 05:13 PM.

  4. #4

    Default Re: Philips vs sylvania h9?

    Quote Originally Posted by Ls400 View Post
    Any preference for either the Philips or Sylvania h9 bulb?
    No.

  5. #5
    Moderator Alaric Darconville's Avatar
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    Default Re: Philips vs sylvania h9?

    A couple of 2017 posts are
    here and here. In the latter, -Virgil- lists several brands with no particular 'favorite'. If the brand you are contemplating isn't listed, that is a sign that it's not one you should get.

    For the high beam, use this HIR1 which will fit once you carefully trim the base according to the instructions here. Headlamp condition and aim are already important, but with these upgrades (particularly the H9 upgrade in the low beams because they're used around other traffic, they're critical). Get your headlamps professionally aimed-- and if the lenses show visible degradation you might need to get new OEM headlamps.

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