6000k is as high as I would go. They'll put you at approx 2900 lumens vs 3100 for stock. They have a nice hint of blue. 8000k will be blue and you'll be looking at 2500 lumens which is still brighter than the halogen bulbs that are still being used on some cars.
I carry the low bulbs and license plate led bulbs. We're working on reverse and parking lights now.
Contact me direct with any questions.
Headlights
Tag lights