There are a lot of companies these days selling retrofit HID bulbs to convert a cars original halogen bulbs. But there appears to be a lot of confusion between companies about what these bulbs can and cannot do. So I decided it was time for me to look in to this a little further. The further I looked the more questions appeared and I have ended up contacting a significant number of people. I have ended up getting information from Manufactures, Retailers, UK Police, UK Government, US Government, United Nations, Universities and Insurance Companies to name but a few. Please feel free to read through my findings.