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Thread: Any Differences Between H9 Manufacurers?

  1. #1

    Default Any Differences Between H9 Manufacurers?

    Are there any performance or longevity differences between the various H9 bulbs?

    Narva H9

    Sylvania 64213 H9

    Philips 12361 H9
    Last edited by PCHOne; 08-09-2011 at 02:53 AM.

  2. #2

    Default Re: Any Differences Between H9 Manufacurers?

    No practical differences; H9s from Sylvania/Osram or Philips/Narva or GE/Tungsram are functionally identical. Take twenty samples of each and run them through the various pertinent tests (filament geometry, output, power consumption, lifespan) and the results will be more or less randomly distributed among the brands. But I would stick within those three makers/six brands.

  3. #3

    Default

    Thank you sir.

  4. #4

    Default

    A follow-up question if I may?

    What is the lifespan of a H9? I see you and others quoting lifespan hrs for other bulbs (usually the high effacacy) but have not seen one for the H9. Thanks.

  5. #5

    Default Re: Any Differences Between H9 Manufacurers?

    Osram's values are typical: 250 hours B3, 500 hours Tc.

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