I have fitted severd HID conversions to both cars and bikes.
I buy all my kits from
Philips HID,Philips Visionplus,Philips BlueVision,Philips DiamondVision, Philips Power2night and GE HID,GE Megalightplus, GE Euroblue sold by the industry experts
We even set up a group buy over on the rennlist forum for these, and I documented the install process
The advantage is that they sell HID lamps with H1 H3 or H4 mountings, all with the glass of the lamp at the correct depth so the focus is unaffected. Therefore you get the power without all the nightmare of having to change lamp units.
For information, projector style lights when using filament lamps are the least efficient, but with a HID lamp mounted who cares. A 35W HID lamp throws out twice as much light as a 55W filament lamp.
The lamps themselves are offered in different colour temperatures. While the blue ones may look cool they unfortunately offer the least light penetration. I therefore always use the 4500 lamps.
No idea for you USA guys, but in the UK HID/Zenon lights are only legal if self levelling headlamps are installed. All of the cars I've fitted these to had manual levelling (switch on the dash), and all have sailed through MoTs with no problems.
Finally, your a bit overspec'd there John. They take a max of 20 amps to strike, so a 20 amp fuse is fine. You are right though that it makes sense to use an auxilliary relay so that current doesn't have to flow through the main switch etc.
Hope that helps
