Re: HID bulb
In the early Winter of 2006 I purchased low and high beam HID from HID ONLINE out of the UK. I have a 2005 LT. The low beam is H7 and the high beam is H9. I've never had an issue with the H7 and rarely use the H9 because it, along with the low beam H7 is just overpowering to oncoming motorists even with appropriate aiming of each headlight. For me, the high beam H9 has been pretty much a waste of $ except when riding at night through forests. In that situation, they really light up the area ahead! If there was any installation concern, it was that the ballasts were good-sized but still suitable for installation inside the nose cone.
HID ONLINE took the HID system for Mercedes, the first vehicle to incorporate HID Xenon lighting, and redesigned the ballast for more durability on motorcycles. Finally, the H7 operates at 4100 degrees Kelvin and the H9 at 4300 degrees Kelvin...both very white. Through the years I have seen the size of the ballasts shrink in size and operating temps rise.
Just remember, getting up to 4400+ degrees Kelvin introduces blue wavelength which is the first wavelength which irritates oncoming motorists' vision. Much higher in op temp and purple/violet is introduced which some of the lame, young cage drivers think is really cool.