We've had the bulbs installed on both of the Seegs, and we have a hell of a time with people flashing us everytime we ride at night, I've adjusted them so that there almost shining straight down and people still think we have our high beams on, there SO bright.
you're getting flashed because the factory DOT headlight housings were not designed for HID. the factory housings cannot focus the HID beam properly because they were designed for the halogen bulbs, and as a result you're throwing light everywhere....
to truly take advantage of a HID bulb you need a projector housing, and this bulb swap HID kits are not DOT approved so you can get pulled over and ticketed for using them, plus they will not pass state inspection (in the states that have vehicle inspection).
but, if they cause people to see you better, then F'em.......... LOL