I am very curious to know how does H7 type bulb run as both High beam and Low beam since I can only see one single filament. Which portion (top or bottom) of the bulb is running high/low beam? Also, I have heard the DRL in BMW is running as high beam, is that correct?
No mystery; 4-headlamp system with H7 bulbs in all 4 fixtures. The optics (reflectors. shielding) are different, is all. Many cars use the high beams as DRLs - but at reduced voltage when in DRL mode, greatly reducing the light intensity.
So, no matter it is used under high beam or low beam application, it still light up the same part of filament/bulb? The light (from the bulb) won't change at all?
