I recently bought an '05 LL Bean that had an HID conversion. I know nothing about where the kit from and when it was installed. Just had a passenger bulb burn out and went to change it, never having changed an HID before and to my surprise, there was a lot more going on. I think I figured it out but was wanting to know if anyone had any suggestions as to what is a good bulb? I plan to replace them both and do I need to replace the ballast or just the bulbs, using the existing ballast? Do the H7 bulbs already come with all the wires attached so just plug and play?