Older DRL Lights - Fading/Yellow vs New

[besnova]

I bought two used 2013 Model S headlights for my black out project. I notice the DRL LEDs are yellow/fading vs my stock/untouched 2014 DRL LEDs which is basically pure white. Is it because the LEDs have not been turned on in a while or is there a way that I can restore the LEDs to shine whiter? I know there is an issue with the new re-designed headlights but I cannot find anything on Google or this forum for the older headlights with the projector light.

Anyone can explain this to me? See photos. I will try to link a video as well.

The passenger side headlight is stock, and the driver side headlight is the used headlight I bought from eBay. Both used headlights though are more yellow than the stock headlights that came with the car.

 

[besnova]

 

[besnova]

 

[Del Schier]

I have had 3 DRL's turn yellow mostly in the inside corner. They are not LED's they are fluorescent. If you look at them in a dark garage you will see them glowing. Inside they have two high voltage leads going to them. I think the problem is with the gas inside getting contaminated or just the phosphorescent coating going bad, I doubt it is the power supply. House fluorescent lights do the same thing with time. Someone should make electroluminescent stickers to stick over them and wire up.

 

[Jbomb808]

My 2018 ms did this. Tesla replaced them under warranty.

 

[besnova]

It actually wasn't that noticeable, except for me. When I asked people about it, they didn't notice. Also, I sold the car and now have a 2018 MS, which Tesla did replace both headlights due to the DRL not reaching all across the headlight.

Looking back at this though, it was a fun project.

 

[Del Schier]

I have had 3 DRL's turn yellow mostly in the inside corner. They are not LED's they are fluorescent. If you look at them in a dark garage you will see them glowing. Inside they have two high voltage leads going to them. I think the problem is with the gas inside getting contaminated or just the phosphorescent coating going bad, I doubt it is the power supply. House fluorescent lights do the same thing with time. Someone should make electroluminescent stickers to stick over them and wire up.

I cut one of my yellowed ones open. There are LEDs behind a florescent strip. I am trying to figure out what part # tag indicates that it is one that has had the problem fixed.