I am not trying to offend anyone here or stepping anyone's tail but HID comes cheap these days. 100W watt white halogen will make your headlight blur in less than 1 year's time unless your headlamp is made of glass. I've been playing with cars and its accessories for more than a century.
Those average HIDs are ranged between RM 300 to 500 only compares to bulbs which cost around 200 to 300 for a good ones. It's not necessary to go for those high quality and branded ones. I have few friends who use Taiwan and Korean HIDs for their cars and it' been working pretty well for the past 2 years.
I am using a "made in taiwan" HID for the past 10 months and it's working extremely well until today. And the price I got is less than RM 500 for a brand new set with 1 year warranty.
Last but not least, I am just saying HIDs are cheap nowadays so the people in ZTH can consider changing to HIDs instead of changing bulbs and enjoy the luxury of bright and clear lights form their HID headlamp. Sorry again if I offend anyone here