Anyone who's seen my ST13 coming towards them INSTANTLY NOTICES the 6000K HIDs in the main headlight array.
At this temperature - they are 'whiter than the sun' and therefore stand out from any reflections etc.
This has stopped close calls since I installed them (from in front of me anyway), and also lights up the road well at night.
This does not mean they blind oncoming drivers, as they are a set, directional beam, same as OEM halogens - just that they are peculiarly 'white' and get noticed.
Cheers, Diesel