I was running HID's that I got off of ebay, I had them in my impala, and they worked well, but in my Hummer they kept going out, probably because I needed the the extra resistor with them. So I switched over to the ultra's they are bright, but when you pair them with the ultra fog lights, they are really bright, I just tired them both together for the first time last night on my way home and i could see a good distance and it has a good wide range too, good for seeing deer in the country. A lot of people were flashing there brights at me because they thought that I had mine on but I was just running my low beams with my fogs. I am very pleased with the set up compaired to the factory set up!!!!