When I first got my first DDM HID kit 55w/5000k for my Low Beams, it came with a bad ballast. Sometimes it worked and sometimes it didn't. DDM replaced it and the replacement has performed great since. The difference between my stock High Beams and the DDM HID Low Beams was amazing. My Lows were 1000 better than the Highs yet to oncoming traffic they were of no problem for them. I have since added a 55w/5000k kit to my High Beams and a 35w/5000k kit to my Fog/Driving Lights. I'm loving the extra light output, especially on these dark country roads that I live on almost a hour from the city. I'd attach a combined pics comparison pic if I could for you to see the difference.