I also live in SoCal. I have been using them for about a year with no problem, and have seen several others with Euros. I keep the old US lights in case I ever get an 'equipment violation' ticket so I can swap back temporarily. Courteous use of the high beams helps minimize chances of 'official' attention.
Where abouts in SoCal? I am in south Orange county. If you want to see Euro lights and their beam patterns, you are welcome to look at mine.
2003 Firemist Red/grey leather SL 500
2015 Palladium Silver/black mbtex GLK 350
1987 Smoke Silver/burgundy mbtex 300E Sportline (SOLD)
Click to see 87 300E