Sorry to sound like a newb but I need someone to explain the difference between HID Kits from places like HID Express or Lavalighting and plug in bulbs like the Sylvania Silverstars. I have been checking out all the websites and I see the HID kits sell for around 5-6 hundred and you can buy bulbs for under 50 bucks. What is the deal? I have purchased the glass headlights for my 95 and I want to upgrade the lights. Someone please help. By the way so I don't get flamed, I tried to search already.