HID Headlight conversion

Hersbird said
The link for the xe7 and xe7r is something about UFOs.

That's my fault (typo). I'll fix it as soon as I'm done with this post.

I also wouldn't go with the HID bulb in the H4 lense w/o the projector to focus the beam.

Even halogen projector lamps do not work safely or effectively (or legally) with "HID kits".

A simple H4 conversion and harness is the way to go for good legal light w/o spending $1000.

True -- or even just a set of GE Night Hawk H6024NH sealed beams (the only ones worth buying) for very cheap money. With H4 or any other headlamp you have to be very picky about what you buy. Most of what's on the market is garbage of one kind or another. There are lots of headlight-shaped toys from China flushing around on the internet.

I do like this site:
http://www.theretrofitsource.com/index.php
Seems like a good H4 7" round housing with clear glass and one of these kits would perfrom the same as the xe7 or xe7r at less then 1/2 the price.

That's a whole different can of worms. Removing the projector optics from a used headlamp (or buying from retrofitsource) and installing them in another kind of headlight housing can be done, but it is a whole lot harder and more complicated to do correctly than it might seem. Typically the "recipe" goes along the lines of baking the headlight assembly to open it (loosen the adhesive), cut the reflector, paint it black, mount the HID projector, aim it within the headlamp, and use silicone sealant to seal it up. But the devil's in the details and there are all kinds of problems not mentioned in that recipe. Silicone-based sealants produce gases as they cure (and heat up) that attack and degrade the optics. The projector has to be mounted with extreme precision; if you get the center of gravity and load distribution wrong it will shake-rattle-and-roll out of alignment and eventually off its mounts. It's difficult to get a good and durable seal after the lamp's been baked...there's always a bunch of light bouncing around inside the housing and without very careful cut-and-try/cut-and-try-again masking you stand excellent chances of creating streaks and washes of stray light that will bug the crap out of you when driving at night (and cause dangerous and illegal levels of glare to other drivers), etc.

But yeah, if you're doing homemade headlamps, something along this line at least stands you a chance of winding up with a usable, safe result. An "HID kit" in a halogen optic never does.