cool, thanks for the info

 

I thought bi-xenon means a shuttered system by definition, therefore no warm-up time?

 

Bi-xenon doesn't mean they have 2 different HID light bulbs.
It's 1 bulb/ballast and a shutter type panel opening and closing.

Dan

 

there is no warmup time if your HIDs are already on, but if you want to flash your lights for whatever reason you cant until theyve warmed up (well you can, but its not warmed up yet and well you get the point)

 

bud, the bi-xenon setup on my m3 has no delay when flashing someone. the only time there's a delay is in the morning first time starting the car after it's been sitting.

it has this cover and the cover goes peek-a-boo and the effect is... flash flash. the cover moves pretty damn quickly.

 

exactly.

here are some FAQ's for bi-xenon projectors as well as a couple of videos from a customers car:
http://www.izntrbl.com/faq.php#8

 

Does your M3 have daytime running lights? If so, then that's the explanation. If the lights are completely off and you flash someone, there is some finite amount of time that HIDs would need in order to warm up before they would output full intensity. I believe that is what mrgoochio is referring to.

 

no they do not have DRL. i believe if the car's lights are off, the car is smart enough to flash using the conventional halogens. if the hid lights are on, then the hid shutter will do its thing to flash.

on my 911, same deal.... i think. i rarely flash.