Baron G said:The thing I don't understand is what was the problem with halogen lights that led to a need for HID's?
As far I can see the reason most people want HID's is because it makes their car look more expensive / 'cool', which is a pretty inadequate justification for compromising other road users' safety.
Possibly, but not in my own personal case. I think the people more likely to do that would most probably just buy those blue tinted bulbs rather than go to the considerable expense of fitting HID's. Not saying they all would, but the prime reason for 99% of people fitting kits like these ones, is to improve the light on the road and make driving safer. Honestly, if you have ever been in a Calibra at night, you would be simply amazed at how poor the lights are!!.
If you do a search on any Vaux or Calibra forums, you will see a lot of complaints about the headlights. They appear to be a very common bugbear from owners. The inherent design of the projector beam unit isn't at fault, its the substandard wiring loom and fittings that Vauxhall added to them that appears to be the problem. There's a voltage drop between the headlight and the power source. It can be addressed somewhat, by taking a direct feed from the 12v source, through a couple of relays, but that all seemed a bit "Heath Robinson" to me. Many owners fitted HID kits and reported back that it was a massive improvement, despite obviously, the voltage drop still being present. It's more effective than adding 100W bulbs which again, make little to no difference.
Interestingly enough, most HID kits mine included, run the bulbs at @35W.