none yet but its def. much brighter than the regular bulbs i had in there before. The 5000K gives off a slightly more blueish color than the factory hid's but its a pretty good match. Far from those ghetto 6000K and up blue/purple hids i see idiots running around with in their mini vans.
Current - 2013 N55 535xi Msport SAT
Retired - 2009 N54 335i Msport 6MT
Retired - 2000 M52TU 323i ASA Supercharged 5MT
More photos of my car here