HID Headlights

[PaulSmith]

And that's the whole point, all retro-fit HID kit's on the market today don't have the arc in the right position. And the HID kits with mechanical hi/lo bulbs are the worse offenders -

• the arc poorly positioned and on every kit I've seen, and its compounded by the fact because the bulb has far too much lateral movement.
  
• the baffling for the dip beam is nearly always next to useless, so that you get overspill which dazzles other road users.
  
• on hi-beam the position and baffling is so bad that you just get some half-assed pattern and not all of the light being exposed to the reflector.
  

"all retro-fit HID kit's on the market today don't have the arc in the right position." Really!  :eek All of them? Wow, that is a big claim. I mean, who would have thought that companies like Phillips and Osram wouldn't know how to make a H4 bulb properly? Thank goodness there are people like you on the internet to put them right. So what is the correct position for the light source? Just so I can check my own bulbs are OK?