HID Question.
 

I'm seeing some REALLY inexpensive H4 HID kits on Ebay and Kijiji.

Which brand names are good?

Are the dual bulb type better than the other(?)?

in my opinion, none are quality items. bear in mind that all H4 halogen bulbs
are designed for reflector based headlights. the dimensions and specifications
are designed around a halogen bulb focal point.

when you take an HID and rebase it for H4, the focal point is shifted and the
result will nearly always be glare. glare at such a high intensity, is at the
very least, annoying as hell.....to dangerous to opposing drivers.

their design is a rube goldberg delight....and there are some doozies out there.
using such a kit in a halogen unit is also illegal in the US and many countries.

x2

It will be bright and blue, and all over the place. You might consider it better light for driving, everyone else will consider it worth following you home with a hammer.

Get good quality bulbs for your lights, or go to a decent quality Euro light.

I installed Depots purchased on Ebay for $389 complete HID high and low beam with clear corner lenses and glass headlight lenses. I love'em. I got 6000k rather than 8000k on the advise of Ca. Highway Patrol. Nobody has flashed their brights at me yet. I can see at night now, and I had problems before. They look great in my opinion.

If you plan to get it from any of those sites 99% of the kits are the same, just gotta get a good buyer that will exchange the item if it has an issue.

For what car is it?
In my opinion HID lights on old cars looks pretty funny