LED headlights for 2012 Prius C

Discussion in 'Prius c Technical Discussion' started by wongnog, Dec 28, 2019.

  1. wongnog

    wongnog Member

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    I'm looking to replace my headlights with LED bulbs. I got this combo kit for H11 low beams and 9005 high beams:

    Amazon CA:
    Amazon US:


    When I asked the seller if these should work, they replied "...your vehicle's 9005 headlight bulb is shared with your DRL, as the working voltage of DRL is 6-9V, the headlight is 12V, the voltage is different, it is too powerful to light up in DRL model. It may be flickering or not turn on. So if you use 9005 headlights as your high beam, then it may be flickering or not turn on."

    Has anyone run into this issue? I've read about some people needing to add a resistor, but I'm not certain what that means/is?

    I also got these H16 bulbs for my fog lights, but that seems to be a more difficult install so I won't try them yet:

    Amazon CA:
    Amazon US:


    P.S. looks like you may need to turn off adblocker for the amazon links above to appear
     
  2. icspots

    icspots Junior Member

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    Many DRL systems use pulsed power to produce the dimmer light during the daytime, then constant power for the actual high beam. LEDs don’t like pulsed power because they need constant minimum voltage to light up. What you’d likely need is a capacitor harness to plug inline with your lamps.... so the pulsed power would charge the capacitor, and the capacitor would power the lamps.

    When I bought my LED lamps from the retrofit source it gave an option of their anti-flicker harness when I added the lamps. I was just swapping the low beams so I didn’t worry about it. They sell their anti-flicker harnesses separate, $30/pair.
     
  3. rjdriver

    rjdriver Active Member

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    For the sake of those of us who are being blinded quite often these days even by OEM LED headlights, please make sure they installed and aimed correctly. .
     
    #3 rjdriver, Mar 2, 2020
    Last edited: Mar 2, 2020
    dubit likes this.
  4. Lee3740

    Lee3740 New Member

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  5. icspots

    icspots Junior Member

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    Honestly that’s true across the board regardless of what’s making the light.
     
  6. dig4dirt

    dig4dirt MoonGlow

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    I will say sitting in a "c" ....now it seems like everything will blind, but
    for sure all those newer SUV get me all the time.

    Used to only be the old school jeeps and some pickups.
     
  7. sam spade 2

    sam spade 2 Senior Member

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    I think these comments are falling on deaf ears but .........................

    All but the most expensive replacement LED headlights often do not produce the right dispersal pattern and may not even produce as much raw illumination as stock.

    Unless you replace the entire headlight assembly, you can't be sure of a good result.
    And even then they might not actually produce more light.

    Newer isn't always better.

    So IF you drive a lot in rural areas where there is little traffic at night, a set of aux. driving lights would be much easier and likely much better, without sacrificing the stock headlights for urban use.
     
  8. Jay Chu

    Jay Chu New Member

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    Thinking of doing this project as well
     
  9. icspots

    icspots Junior Member

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    It’s good to bring up, and true of many headlight kits which swap from a halogen lamp. We swapped out to the LED low beams not for brighter, or whiter, improved beam, etc. We swapped because it’s my wife’s commuter car (100 miles/day) and we’ve had a low beam lamp blow every 1-2 months for the last year. These were just standard H11 halogens, no “fancy” upped wattage lamps that burn themselves to death.

    The beam pattern and light output are similar to halogens, if a bit whiter.

    If I wanted brighter lights or a better beam pattern I’d be swapping out the projector for something much improved. Not planning on dropping that money into this car though.
     
  10. sam spade 2

    sam spade 2 Senior Member

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    This is odd. Because my family is on our 4th C now over about 6 years and have never had a single bulb go out.
    Does the car get driven at night much ? Because the DRL function uses the high beams at reduced power, I believe.

    You might want to have the charging voltage for the 12 V battery checked.
    It might be a bit too high.
     
  11. icspots

    icspots Junior Member

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    No doubt it’s odd. Battery checked out fine, alternator not overcharging. I’ve never had an issue with headlights like this on any other car. DRL is used daily, and yes it uses the high beam lamps with a pulsed power feed. During the winter the car was almost only driven in the dark because her commute was all before sunrise and after sunset. During the summer it almost always driven during the day.
     
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