I HID retrofitted my Hella 550's
 

and good lord, they are awesome! I threw a spare 35 watt 5000k kit I had laying around into these lights, made some brackets, and bolted them in behind my bumper. The effects are spectacular.

All of the following pictures are w/ high beams on, so my headlights are blinding. Low shutter speed on my Camera phone also.

http://s229.photobucket.com/albums/e...69194270_0.jpg

http://s229.photobucket.com/albums/e...69577296_0.jpg

http://i229.photobucket.com/albums/e...68908088_0.jpg

I'm thinking about also mounting some Hella Micro FF's next to my 550's, and converting those to 55watt HID.

Light FTW. :)