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Conversely, there are standard HID installations that are IMO quite deadly to the driver. The BMW ones that I have driven spring to mind. The main beam is fantastic but as soon as you go onto dip the cut off (presumably to prevent the high intensity light dazzling oncoming drivers) is so sharp that you go from a wonderful field of vision to a small pool of light that stops 25m in front of the car with pitch blackness beyond. On unlit twisty roads that can be quite deadly since you go from seeing everthing to seeing nothing when you dip for an oncomiming car just as you go into a bend. IMO the dip beam needs a 'bleed' of light around the periphery to retain vision. We all had the problem when we went from tungsten 45/40W to halogen 60/55W and there were similar complaints about brightness. I would hope that we all get used to HIDs with a little bleed as they can be useful. Besides, its kinda futile having sharp cut off when you have a heavily loaded car or one that is approaching over a bumpy road.
Clive
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