Xenon Headlights - Unusual LED Lighting Pattern? (YouTube vid)

[M_D_O_London]

Morning All,

Was watching a review of an A3 1.8 TFSI 8V Sportback on YouTube by RPM TV (South Africa) and couldn't help notice that the vehicle has the LED daytime running lights on a strange 'demo' mode when stationary (where light seems to gradually run through the cluster). Can be seen from 3 seconds in and various other times when the vehicle is stationary.

Is this a special feature of some sort? Am sure I'm not just seeing things!

https://www.youtube.com/watch?v=naOVHc2Ptz4&feature=youtube_gdata_player

 

[RJMahieu]

It's not a feature I'm aware of. In fact, due to the erratic nature, I'm guessing it's because of a difference in frequency between the lights and the camera.

 

[JohnM100]

It's not a feature I'm aware of. In fact, due to the erratic nature, I'm guessing it's because of a difference in frequency between the lights and the camera.

+1

 

[mjcourtney]

Yep - it's the scan rate of the LEDs showing up as a strobe effect when filmed. To the naked eye they'll appear to be solidly on.

 

[cemerson]

So the answer is yes, you can have that effect if you film your LED lights with the right framerate, and then play it back to yourself

 

[M_D_O_London]

Ah yes - of course, that's it. Have seen similar effects on Top Gear when they've had vehicles with LED's. In slow-motion shots, the lights appear to flash / flicker. Frame rate frequency makes complete sense.

So - no MMI setting for DRL 'dance mode'

 

[RJMahieu]

It's too bad though. Dance mode would be a fun feature