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Old Jul 27, 2023 | 11:22 AM
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Default Headlight Bulb Replacement questions

Hello All,

Looking for some guidance with regards to headlight bulb replacement on my 2014 Z51. Passenger side bulb is out.

I have a great body guy that will take care of removing the front fascia and installing the new bulb. I'm going to replace both bulbs while it's apart.

Is there any advantage in replacing with the GM13587843 that cost ~ $120 - $150 each, versus using an Osram or Philips D3S equivalent? As far as I am aware, GM sources it's bulbs from Osram primarily. The Osram or Philips bulbs cost around $70 each.

Also, any need to replace the ballasts while in there??

Appreciate any and all recommendations,

Thanks!
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Old Jul 27, 2023 | 11:24 AM
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https://bulbfacts.com/hid-oe/chart/
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Old Jul 27, 2023 | 11:45 AM
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Just do the rest of us a favor and choose a bulb that has the same color temperature as the stock bulb. Too many people are going for the 6K blue look that blinds oncoming drivers and doesn't light the road as well for the person driving the car.

Bill
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Old Jul 27, 2023 | 03:43 PM
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Originally Posted by Bill Dearborn
Just do the rest of us a favor and choose a bulb that has the same color temperature as the stock bulb. Too many people are going for the 6K blue look that blinds oncoming drivers and doesn't light the road as well for the person driving the car.

Bill
Thanks CPB!

Bill D.,

Always enjoy reading your commentary. I fully agree with your comments on the Ultra Bright Blue lights. I've been very happy with the OEM bulbs. Gonna go with the Osram OEM bulb.

Thx
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Old Jul 27, 2023 | 05:54 PM
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A somewhat brighter HID bulb, from a reputable manufacturer, is the Osram "Night Breaker Laser Xenarc". These bulbs have pretty much stock color (4400K color temperature), which is optimum for illumination (rather than the bluer colors). They will realistically give you 25% to 50% more light output (lumens) than the factory bulb. These are plug-and-play replacements, once you get the headlight assembly off the car.

Buy from a reputable vendor, as there are lots of fake clones of these bulbs, I recommend HID Concepts.
The Corvette uses a "D3S" type of bulb. The Osram part number is 66340XNN (each bulb).
These bulbs are about $180 a pair.

As all things, there are trade-offs, these brighter bulbs have a somewhat shorter lifetime than standard bulbs.

You do not need to replace the ballasts.
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Old Jul 27, 2023 | 09:22 PM
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Originally Posted by Gatorboy165
Hello All,

Looking for some guidance with regards to headlight bulb replacement on my 2014 Z51. Passenger side bulb is out.

I have a great body guy that will take care of removing the front fascia and installing the new bulb. I'm going to replace both bulbs while it's apart.

Is there any advantage in replacing with the GM13587843 that cost ~ $120 - $150 each, versus using an Osram or Philips D3S equivalent? As far as I am aware, GM sources it's bulbs from Osram primarily. The Osram or Philips bulbs cost around $70 each.

Also, any need to replace the ballasts while in there??

Appreciate any and all recommendations,

Thanks!
My personal observation for the last 20 plus years of MB is this. You can buy the Osram Sylvania bulbs at a fraction of the price of the one from MB. That said, for whatever reason, the ones from the dealer seem to last longer. Considering that they are a PITA to get to, I don't know if skimping on the bulb is the best way to go.
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Old Jul 27, 2023 | 09:24 PM
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Originally Posted by Bill Dearborn
Just do the rest of us a favor and choose a bulb that has the same color temperature as the stock bulb. Too many people are going for the 6K blue look that blinds oncoming drivers and doesn't light the road as well for the person driving the car.

Bill
'Why do you say that? I switched to 6000K bulbs for a couple trucks and it seems to do a better job for me in dark places when I have to drive in the back roads.
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Old Jul 28, 2023 | 03:24 PM
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Originally Posted by aklim
'Why do you say that? I switched to 6000K bulbs for a couple trucks and it seems to do a better job for me in dark places when I have to drive in the back roads.
I think he's incorrectly attributing poorly aimed headlights and glare from conversions with 6k bulbs. Since for the most part 6k bulbs have lower output compared to things offered in the 4.7k - 5.7k range.
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Old Jul 28, 2023 | 03:35 PM
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The eye is less sensitive to blue light, effectively lowering the useful lumens of the blue bulbs.
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Old Jul 28, 2023 | 03:38 PM
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Originally Posted by CPB
I think he's incorrectly attributing poorly aimed headlights and glare from conversions with 6k bulbs. Since for the most part 6k bulbs have lower output compared to things offered in the 4.7k - 5.7k range.
Fair point. I have been dazzles by incandescent lights that were aimed at who knows what. One up and one down. Not sure what they are looking for but both bases are covered.
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Old Jul 28, 2023 | 03:41 PM
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Originally Posted by ersatz928
The eye is less sensitive to blue light, effectively lowering the useful lumens of the blue bulbs.
Is 6000k blue?
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Old Aug 1, 2023 | 12:41 PM
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Yes
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Old Aug 1, 2023 | 01:31 PM
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Originally Posted by ersatz928
Yes
Mine seems more white than blue so not sure.
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Old Nov 23, 2023 | 08:57 AM
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Originally Posted by aklim
'Why do you say that? I switched to 6000K bulbs for a couple trucks and it seems to do a better job for me in dark places when I have to drive in the back roads.
They have less visable light to the human eye due to their hue/tint. The kelvin color with the most visible light to the human eye is roughly 4500k, someone please feel free to correct me if i am in fact wrong lol
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Old Nov 23, 2023 | 10:15 AM
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Originally Posted by Quietcropduster
They have less visable light to the human eye due to their hue/tint. The kelvin color with the most visible light to the human eye is roughly 4500k, someone please feel free to correct me if i am in fact wrong lol
I don't follow. Isn't daylight about 6000-6500? That's what I was going for.
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Old Nov 23, 2023 | 11:20 AM
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The human eye is most sensitive to yellowish-green light.
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Old Nov 23, 2023 | 11:27 AM
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Originally Posted by ersatz928
The human eye is most sensitive to yellowish-green light.
But is that a good thing to be dumping at night? How would it work when the light reflects off certain colors? This is why I thought white would be best since it simulates daylight and keeps things on an even keel.
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Old Nov 23, 2023 | 12:22 PM
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I have 6K lights and they seem white to me. They definitely are not blue.


Elmer
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Old Nov 23, 2023 | 07:44 PM
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Originally Posted by eboggs_jkvl
I have 6K lights and they seem white to me. They definitely are not blue.


Elmer

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Old Nov 23, 2023 | 08:12 PM
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Originally Posted by aklim
However, they do provide less visibility to the driver while literally blinding oncoming older drivers. Do you really enjoy driving at night with poorer visibility while half the drivers coming toward you are blind and guessing where they have their car pointed? The best lights are around 4K to 4.5K color temperature. The same ones that were delivered from the factory.

Bill
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