[No one]

Originally Posted by jaze55

I had a 2008 bmw 135i factory fitted with xennons. The LEDs on the m140i are far superior.

Xenon headlights appear (reportedly) degrading over time before they go down completely (like those stars in the sky, but just a tad faster ):

http://www.1addicts.com/forums/showthread.php?t=783937

https://www.hidplanet.com/forums/for...354#post257354

https://www.carlightblog.com/2014/09...about-to-fail/

http://www.audiworld.com/forums/a6-s...bulbs-2796500/

http://www.clublexus.com/forums/ligh...vy-useage.html

https://en.wikipedia.org/wiki/High-i...mp#End_of_life