Thanks for your answers. Mike, I had to raise the beam, not lower it. Now about the adjustment and what I meant about the notches, which might be a bad choice of word but anyway, when you turn the adjusting screw, you will feel resistance and when you turn it a little more, the resistance stops, and that's what I call one notch. I'm sure I didn't alter the housing alignment. The need for raising the beam must have come from the difference in the focal point between the halogen bulbs and the HIDs as Spike says. Or if the HID bulb actually is touching the arm infront of it, bending the arm as a result. I have yet to check this theory, but is this possible? I've attached a pic of the halogen bulb to the left and the HID one on the right and from what I can see, the filament and the arc seems to be in pretty much the same location. And I've actually compared the old halogen bulb by holding it in front of the screen at the same scale as the contour of the HID one in the background and the filament is exactly in the same location as the arc.