So I was doing some research on the IS and I came across this:

Our highbeams use a 9005 bulb which are also our DRL's during the day. But our cars also come with (should you buy it) bi-xenon headlamps. So how does this work?

I went through the OSRAM SYLVANIA site and read that the 9005 bulb is a halogen. But they're also our highbeams. So does that mean the DRL bulb runs at full power while simultaneously the lowbeam shoots upward?

 

The 9005 is on full power when the high beams are on.. The Xenon have a separate projector on the top part of the lens that projects higher. We really dont need the 9005s.

Next time cover your 9005 with your hand when you have the highs on. You wont see much difference.

 

i think the 9005 comes into use, but not very much in the US.

for countries that use "flash-to-pass" i think the HID's wouldn't warm up quickly enough or something to that effect. That's why we still have the standard halogen on the high-beam in addition to the HID

 

Then why do some Porsches and Infiniti FX have Bi-Xenon headlamps with no halogen bulbs?

 

hmm no idea, i'm sure someone on here can explain hehehe

perhaps just a design?

 

I think it is called form before function!

 

Double check me on this, but I don't think that's how Bixenons work
I believe they utilize two filaments within the same bulb.

When you activate the high beam, the high beam filament is pushed upward by some mechanism into view and turned on?

 

bi-xenons has a cutoff shield thatis motorized, when u turn on the high beams the sheild moves higher, letting light go beyond the normal cut-off limit

 

DING DING DING! There is no separate filament in the bulb. Example Ell Y 9006 bulbs will have that one for the lows and one for the highs. 2 filaments on my H11 bulbs but they are not on at the same time as the 9006 bulbs when the highs are on