I'm looking to buy a kit and found one that has many different options for the bulb size, kind of confused as to which one I would want. I've searched the forums and found that the correct size for the headlights are 9007 for a 2000 grand prix. The 3 options available in 9007 are as follows: 9007/9004/HB5 Flex Bixenon, 9007/9004/HB5 Single, and 9007/9004/HB5 Hi/Lo Halogen. Can anyone explain to me which bulb is the one that I would want to get, not too sure the difference between the three options available. Thanks
