actually, if you refer to the kevil scale, you'll find it more pure around the 5000-5500ish level, there is a lot of yellow at the level you've mentioned, they may appear more white at dusk/night but just bright yellow in the day.
you also run 8500k in your high beam fitment correct? I do believe you can find them on
but as suggested in the "Kelvin Scale" thread below, running somehting that blue wouldn't be good for vision. I'd suggest 50-5500k becasue white looks a helluv a lot better than yellow and provides way more light than blue
would be able to.
this is along the lines of something you are looking for? what bulb are you running for your lowbeam? anyway, this will have everything you or anyone else is interested in as far as automotive lighting is concerned.