I've been doing some research on my own after reading the article posted by Nicely about the unsuitability of HID conversion kits.
As our S15 headlamps come with projector lamp for lowbeam regardless wether it were HIDs or Halogen.
I have been trying to understand their differences and I think...
Is HID illegal in your country?
Well, I have changed to HID and the mechanic said it's illegal because the light does not splash??
Since S15 has a projector type headlight, I don't know what he meant. I'm sure even with stock lights it won't splash because it's projector and it lights straight...