Anyone else have their LED running lights start to look a little blue? - Jeep Garage - Jeep Forum

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Old 03-24-2015, 11:59 AM
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Anyone else have their LED running lights start to look a little blue?

Hey guys, I wanted to see if this was a widespread thing or not, since I just saw it twice in as many minutes.

First - I was driving down the road and saw another jeep coming at me with the HID/LED running lights combo on the front, only it looked like 2 of the LEDs were actually blue instead of the white they should have been. I thought "Huh... never seen that before. Didn't even know they could do that!"

Sure enough, that got me thinking about my LEDs and I had the GF put it in drive while I was watching, and sure as shit, one of my LEDs was blue too! Going to take it into the dealer to see what they say about it, but it should be covered under the MaxCare warranty. Wanted to see if anyone else had dealt with this problem yet!

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Old 03-24-2015, 12:36 PM
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Re: Anyone else have their LED running lights start to look a little blue?

Yep. Had passenger side light unit replaced under warranty last week. 6500 miles. Dealer said they have done several.
By the way, rather than having your girl friend put her foot on the brake while in drive and you standing in front, try driving up to a store window or door and view the reflection!
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Old 03-24-2015, 02:04 PM
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Re: Anyone else have their LED running lights start to look a little blue?

Had a similar issue. One of the passenger side LEDs in the DRL array was purple as Grimace. They swapped it out, but had to order the new headlight assembly which took a few days and a second trip to the dealer.
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Old 03-24-2015, 02:33 PM
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Re: Anyone else have their LED running lights start to look a little blue?

There have been a few threads where this occurred recently, I guess all of us who are retrofitting these into our GC's will be SOL if they go on us
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Old 03-24-2015, 02:53 PM
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Re: Anyone else have their LED running lights start to look a little blue?

Quote:
Originally Posted by WickedXJ View Post
There have been a few threads where this occurred recently, I guess all of us who are retrofitting these into our GC's will be SOL if they go on us
Or, since it's so plug and play with these things, you find a really good friend who's still in warranty and do a swap I figure it shouldn't take more than an hour to remove the front clip and swap out the lights.
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Old 03-24-2015, 06:15 PM
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Re: Anyone else have their LED running lights start to look a little blue?

Then I might just keep the extra set I have!
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Old 03-24-2015, 07:18 PM
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Re: Anyone else have their LED running lights start to look a little blue?

Like a lot of LED's, the LED light is actually blue since much cheaper than a phosphor coating is used to change to what you see as white, sorta like how fluorescent lights generate specific colors of light. If the coating goes bad, you see the blue.

"Did you know there is no such thing as a white LED chip? “White” LEDs (packaged devices) start with a blue LED chip, also referred to in the LED industry as a blue “pump”. Then a yellow-based phosphor is applied over the blue chip – refer back to Figure 1. This combination of colors makes use of a phenomenon known as metamerism5 which occurs when our eyes and brain perceive two different but complementary colors as “mixing” to “create” a third complementary color. When the blue light shines through the yellow phosphor it is down-converted into what we see as white light. Blue LED chip + yellow-based phosphor = white light."

http://www.hadco.com/Hadco/Upload/Co..._Blue_LEDs.pdf
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Old 03-25-2015, 12:58 PM
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Re: Anyone else have their LED running lights start to look a little blue?

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Originally Posted by Dan JGC View Post
Like a lot of LED's, the LED light is actually blue since much cheaper than a phosphor coating is used to change to what you see as white, sorta like how fluorescent lights generate specific colors of light. If the coating goes bad, you see the blue.

"Did you know there is no such thing as a white LED chip? “White” LEDs (packaged devices) start with a blue LED chip, also referred to in the LED industry as a blue “pump”. Then a yellow-based phosphor is applied over the blue chip – refer back to Figure 1. This combination of colors makes use of a phenomenon known as metamerism5 which occurs when our eyes and brain perceive two different but complementary colors as “mixing” to “create” a third complementary color. When the blue light shines through the yellow phosphor it is down-converted into what we see as white light. Blue LED chip + yellow-based phosphor = white light."

http://www.hadco.com/Hadco/Upload/Co..._Blue_LEDs.pdf
Ah damn.... I was hopeful that they had sprung for the tri-color LEDs seeing as it's a part of a $1,000+ package... Now I'm wondering how the phosphorus is going bad, and how to prevent it from happening in the future...
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Old 03-25-2015, 01:55 PM
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Re: Anyone else have their LED running lights start to look a little blue?

LEDs, like any electronic component, can occasionally fail prematurely. Nature of the beast...
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Old 03-25-2015, 02:10 PM
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Re: Anyone else have their LED running lights start to look a little blue?

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Originally Posted by Jim_in_PA View Post
LEDs, like any electronic component, can occasionally fail prematurely. Nature of the beast...
That is, to put it lightly, very misleading. the LED itself has not failed (nor will it at any point in the forseeable future). The Phosphorus coating inside the lens has degraded, but the LED is as bright as ever. If your LED goes out, it's more likely that the wire broke than the LED itself.

For reference - Here's a report from the U.S. Department of energy on the matter.
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Old 03-25-2015, 02:36 PM
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Re: Anyone else have their LED running lights start to look a little blue?

I was speaking generally...but you are correct there are other factors that can be at play here with LEDs. In the case of folks with MY14+ JGC where their LED DRLs are showing altered color over a portion of the unit, the ultimate solution is replacement...
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Old 03-25-2015, 02:58 PM
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Re: Anyone else have their LED running lights start to look a little blue?

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Originally Posted by Jim_in_PA View Post
I was speaking generally...but you are correct there are other factors that can be at play here with LEDs. In the case of folks with MY14+ JGC where their LED DRLs are showing altered color over a portion of the unit, the ultimate solution is replacement...
Oh absolutely, the only solution here is replacement. I just think it's more a problem with the seal on the headlights, and not the electronic components of the LEDs
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