I want to get HID but dont really know much. Do I have to get projectors also? Were can I get good ones?

 

you can use your stock housing but lights will be scattered everywhere and will blind others on the road. you can adjust the headlight lower and should be fine. best route to prevent lights being scattered would be using projector headlight, best result being a retrofit (taking oem hid projectors from another car, for example a BMW or Lexus, and putting it into your civic headlights). another projector route would be using ebay projector headlights but result being not as good as retrofit but better than hid's in stock headlight. it will give the HID light a nice cut off line so the lights aren't scattered everywhere instead holding the light from shining too high. using the ebay projector headlights would give you less light output than the stock headlight but has a cutoff line compared to stock headlights scattered light

 

can you explain the retrofit.