For our cars (corolla)/sportivo) the blub size is H7. I've been doing alot of research lately on HID's, and it has been recommended by alot of ppl NOT to the get ones that are made in china/taiwan. The majority of the ones sold on ebay are from china, and they are the cheapest ones. These are known to break as their quality is very poor. Obviously Euro or Jap ones are more peferrable, but Korean ones aren't too bad either, I saw a brand called Kaixen on (BOS importing) http://home.exetel.com.au/nismo/bosimporting/ I looked up the Kaixen website http://www.kaixenkits.com/ and they seem like they know what they're doing If I do happen to get a set for my stivo, it'll most likely be these ones as the price aren't too bad either.