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The ultimate headlight upgrade H4 (not LED or HID)

Discussion in '2nd Gen. Tacomas (2005-2015)' started by crashnburn80, Oct 27, 2015.

  1. Dec 30, 2019 at 9:32 AM
    #2701
    southwind

    southwind Member

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  2. Dec 30, 2019 at 9:50 AM
    #2702
    crashnburn80

    crashnburn80 [OP] Vehicle Design Engineer

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    I did not test those in the standardized test when I did a bunch of bulbs, but I did compare them to to the Volsa +100s, and by some rudimentary light meter comparison they were within 3% of the Volsa bulbs but had a bit whiter output. You can see where the Volsa +100s fall on the output chart below. While the Philips Xtreme Vision +130 are good bulbs, I'd opt for the Philips Racing Vision +150 for higher intensity output instead.

    Copy/past from the main thread:

    Philips vs Volsa:
    While Osram and Philips are constantly compared and about equal when running the latest version of each bulb, I hadn't seen any comparison with Volsa +100, which was marketed as a replacement to the outgoing 70w Osrams. So I took the opportunity to compare them on a 1st Gen later in the thread here.

    [​IMG]
     
    southwind[QUOTED] likes this.
  3. Dec 30, 2019 at 2:24 PM
    #2703
    obscurotron

    obscurotron Well-Known Member

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    Too many to list, and I've probably forgotten a bunch.
    I have a set due to arrive today. 2 years ago I put in a set of the Osram's....70/65, I think? Whatever the higher wattage Osram was you could use w/out redoing the harness and wiring.

    I loved those lights, but one finally burned out Saturday. I don't feel like upgrading the harness. The 1st gen comparison between the Philips and Volsa bulbs convinced me to try the Philips. Since I still have one good Osram left, I'll swap out the bad bulb and do some comparisons.

    Really hope these Philips are comparable, but I'm setting my expectations low. :-/
     
    Norton likes this.
  4. Dec 30, 2019 at 2:37 PM
    #2704
    pinktaco808

    pinktaco808 Hot Steppa

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    Brightest legal better than stock in stock housimg?
     
  5. Dec 30, 2019 at 2:37 PM
    #2705
    pinktaco808

    pinktaco808 Hot Steppa

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    Brightest legal better than stock in stock housimg?
     
  6. Dec 30, 2019 at 2:57 PM
    #2706
    crashnburn80

    crashnburn80 [OP] Vehicle Design Engineer

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    The GE Xenon H4s have the best low beam performance without sacrificing the high beam. The Philips Racing Vision +150s have higher low beam intensity, but coat the high beam filament in a blue coating which will reduce performance. You can compare the low beam intensity difference between the GE Xenons and the Philips Racing Vision +150 in the chart in my previous post or in the original thread.
     
  7. Dec 30, 2019 at 3:02 PM
    #2707
    308savage

    308savage Well-Known Member

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    pinktaco808 likes this.
  8. Dec 30, 2019 at 5:13 PM
    #2708
    Too Stroked

    Too Stroked Well-Known Member

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    Remember, you need the HD harness for those bad boys.
     
  9. Dec 30, 2019 at 5:31 PM
    #2709
    308savage

    308savage Well-Known Member

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    Harness? What harness? (Already installed!)
     
    crashnburn80[OP] likes this.
  10. Dec 30, 2019 at 7:38 PM
    #2710
    aero253

    aero253 Well-Known Member

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    Why are the headlight harnesses 12AWG? If my math is right, a 100w bulb at 13.8v has about 7.5amps of current. Double that to 15, and you're only looking at a voltage drop of about 2.2% with 14AWG, or 1.4% with 12AWG.

    I'm sure it has something to do with resistance or engine bay temperature, I just don't understand it. I'm asking because I was thinking about making my own harness, and it's much cheaper to do with 14AWG.
     
  11. Dec 30, 2019 at 8:16 PM
    #2711
    Norton

    Norton Senior Member

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    Hopefully, you mean an upgraded harness is already installed, rather than the bulbs? Running those bulbs on the OEM harness could overheat, causing a fire hazard.
     
  12. Dec 30, 2019 at 8:27 PM
    #2712
    crashnburn80

    crashnburn80 [OP] Vehicle Design Engineer

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    14 AWG would certainly work as well, but 12 does perform better. All my lighting stuff is optimized for peak performance. IIRC the voltage gain was .3v at the connector from a 12AWG harness. Operating voltage does fluctuate quite a bit based on alternator output, but also if the vehicle is off and running on battery alone. I always use 12.0v as a safety factor for calculations, which puts draw at 16.7A combined.

    Yikes! I thought he was saying that he already had it installed. I didn’t think of it that way. You definitely want a harness to pull 100w through each headlight.
     
  13. Dec 30, 2019 at 8:55 PM
    #2713
    Norton

    Norton Senior Member

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    Hopefully, you're right and I'm just paranoid. :anonymous:
     
  14. Dec 31, 2019 at 4:12 AM
    #2714
    308savage

    308savage Well-Known Member

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    Headlight Services harness was installed 12-18 months ago. I do appreciate the concern though!
     
  15. Dec 31, 2019 at 7:10 AM
    #2715
    aero253

    aero253 Well-Known Member

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    So 14AWG should be safe, 12AWG is just to minimize the voltage drop and maximize output. I can deal with a slightly lower output as long as it's still safe from overheating.
     
  16. Dec 31, 2019 at 9:13 AM
    #2716
    southwind

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    I ordered the racing vision, thanks!
     
  17. Dec 31, 2019 at 9:14 AM
    #2717
    crashnburn80

    crashnburn80 [OP] Vehicle Design Engineer

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    Yep! 14 AWG will work fine. Be sure to use ceramic connectors at the bulbs in your build.
     
  18. Jan 1, 2020 at 7:55 PM
    #2718
    rb9228

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    Thanks @crashnburn80 for the research and advice! I already received my wiring harness from Headlight Services and now still waiting on my bulbs (AllSeason 85/80w from Amazon UK and Siuper Brights from PowerBulbs). Super excited to upgrade my headlights. Thanks!
     
    crashnburn80[OP] likes this.
  19. Jan 1, 2020 at 8:06 PM
    #2719
    crashnburn80

    crashnburn80 [OP] Vehicle Design Engineer

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    You were able to find the 85/80w bulbs?
     
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  20. Jan 1, 2020 at 8:17 PM
    #2720
    Toy_Runner

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    Yo, if you did, hook the forum up.
     

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