I always thought, and many fellow CPF members told me that, HID kits don't really work. Trust me, I envy those who have new cars with HID headlights, and I always want a pair on my car (which is using incand 9005/9006).
Most (if not all) HID kits in the market I've seen do NOT factor the headlight lens into the equation. Stock HID lights utilize specially designed lens/projector systems. These systems, which may include auto-leveling and beam optical cut-off, allow the use of such high power light WITHOUT blinding other drivers (especially in head-on situation).
Please stop using them - you are endangering all drivers around you.