I trashed the HID's in both my trucks because of ballasts bulbs, etc. I tired the normal sized ones to the slim ones. Nothing lasted. I even installed them with a relay to the battery so they would get full power from the battery. From what I read most of the products are made in the same place and pricing just changes because of name. I tried different companies with the same result, never tried Retro mainly because I was done with them by then. I switched to 80/100 bulbs in the headlights and 80 in the fogs with a harness I made. Brighter than HID's and actually looks better in my opinion because the housing is made for normal bulbs, not ones for a projector.