Go to retro solutions I got a hid kit from them for my 2007 ses zx4 and won't go back there amazing and really good customer service my buddy just installed them on his ford flex and has the same love use the code lite4u and it will save you 10% now these are expensive bulbs but they are worth every penny of it and will last you a long time I would highly recommend the 55watt digital kit with bulb capping is a must get the ballast extension wires you will need them. This kit is far superior than most from what I have seen this will definitely take your head light issue away I never use my brights any more I got the 8000k there white with a slight tint of blue there the brightest you can get you go into 10k and up and it's more for color you can go with 6k but that's what my buddy got for his flex and they weren't nearly as bright anything less than 6 and once again your going more for color there still damn bright don't get me wrong on that just not as bright hope this helps
2007 silver focus zx4 ses with the sport package.
Bolt on fswerks ITG air intake
Pioneer 4400bh sterio
Retro-solutions 55 W 8000k H.I.D kit