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.

__________________
-- raymond~
47º 34'N 122º 18'W