H30, the bulbs take about 1 minute each to install. Plug and play. Take the connector off and unscrew bulb, very easy. Put connector back on. The Xtravison bulbs are not blue and they claim 20% more output?? It's all a matter of choice, I like them but will never be a HID light source. They cost about $20.00 per bulb, the factory bulbs are really OK, but my other car has factory HID system and I notice the difference on the H3. I may opt for after market HID kit, not sure yet as I have not seen one in real time. I did try the Ebay blue bulbs, did not work for me but some people like them. Hope this helps.
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