Bosch supplied 4100 K bulbs only
but their price was reasonable.
I wish I had 6000 K bulbs with palish and whiter light such as
Philips D2S bulb.
If you have much budget, a kit with 7500 K bulbs on the market
Since the version 1 was defective
product, version II is currently being sold.
Note: These are O.E.M. product produced for BOSCH.
You can find better goods by another supplier such as HELLA.
Hella & Devilgear Xenon HID kit is available at eSpeedup