Well after racking my brain trying to figure out why in the heck my lights interfere with my radio sometimes. Well i THINK i have come to a conclusion. I bought my kits of Ebay......first mistake. Now......a ballast operates at some frequency (we will say 120 hz), and radio waves are in in hertz as well. Well in AL the radio stations have to "power down" at night for regulations and rules. So whatever waves this ballast is working on is causing an interference during the low power hours of the night. My guess is the people that spent the extra money on the premium kits are not having these issues. Correct me if i am wrong. Hope this helps anyone contemplating buying a HID retrofit kit......you get what you pay for. Unfortunately i got "misslelau