Sorry, this just seems like a likely thing that would have been discussed here before, but in using the forum search engine and google I couldn't find any discussion of it. I did find some mention from google of first generation police laser units not being able to target into always on headlights, but there was also mention that the laser units have improved to resolve this problem. The article was rather dated, so I'm not sure if the claimed information still applied.
One of my vehicles utilize always on headlights and is due for new ones, typically I prefer the HID lights for all my night driving, they both help me see better and do a better job of annoying slow drivers in front of me when I line up with their mirrors. This had me wondering though if any particular type of headlight, maybe not completely jam a laser unit, but considerably hamper it's ability to function better than another.
I just can't help but wonder if the brightness of say HID headlights would make laser targeting into them less effective, or if maybe there are some newer type of full light spectrum headlights out there that also emit high levels of IR light and maybe working better for laser prevention than another type?