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Tail lights blinking

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Old Apr 30, 2015 | 04:56 PM
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Default Tail lights blinking

So what's the deal with the taillights. I can't see mine while I'm driving, but in several videos of other Z06's, I see them blinking really fast while the car is moving. When does that happen? All modes? Track mode only? Z06's only?
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Old Apr 30, 2015 | 05:03 PM
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Great question, thought it was my computer.....would like to know
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Old Apr 30, 2015 | 05:05 PM
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Originally Posted by Babaron
So what's the deal with the taillights. I can't see mine while I'm driving, but in several videos of other Z06's, I see them blinking really fast while the car is moving. When does that happen? All modes? Track mode only? Z06's only?
LED lights and frame rate issues with the camera?

Bish
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Old Apr 30, 2015 | 05:09 PM
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Originally Posted by thebishman
LED lights and frame rate issues with the camera?

Bish
Hmmmmm...interesting thought...
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Old Apr 30, 2015 | 05:15 PM
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Originally Posted by thebishman
LED lights and frame rate issues with the camera?

Bish
This.

It's a known artifact when you take digital video of some led lights.

They don't look like that irl.
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Old Apr 30, 2015 | 05:34 PM
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Well, there's only one way to confirm this; next time I take it out I am going to have my boy stand behind me as I switch among all the driving modes and see what happens.
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Old Apr 30, 2015 | 05:54 PM
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So in Europe, the BMW 'M' cars at least, (and perhaps others) flash the rear LED brake lights progressively faster the harder you stand on the brake pedal. I had my '13 F10 M5 coded this way and it really gets your attention from behind. Perhaps even a texting 16 yo might notice you screeching to a halt in from of them! lol
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Old Apr 30, 2015 | 05:55 PM
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The above answer is correct.

Camera shutter speed doesn't match up with the wavelength/frequency of the LED taillights. So while one frame catches the lights at their brightest, the next frame may catch the lights at their dimmest, and so on, causing it to look as if the lights are actually rapidly flashing.

The same actually happens with fluorescent lights in an office building. This is not visible to the human eye.
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Old Apr 30, 2015 | 05:56 PM
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Originally Posted by Babaron
Well, there's only one way to confirm this; next time I take it out I am going to have my boy stand behind me as I switch among all the driving modes and see what happens.
If the refresh rate of the led is lower than the frame rate of your camera, you get flicker.

Driving modes have nothing to do with it.

Make it a science lesson for your son, but don't run him over.
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Old Apr 30, 2015 | 05:58 PM
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Its the combo of LED lights and frame rate.

Your led lights in the front do the same thing.

Good example is if you are around another C7, get in yours and look at their park lamps in your backup camera. I show people this all the time at work.
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Old Apr 30, 2015 | 05:59 PM
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^correct

This was a big subject with various televised racing series that use production based cars like the Corvettes and Porsches...the announcers seemed to explain it for years because it was a common question asked.
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Old Apr 30, 2015 | 09:15 PM
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Originally Posted by DaveN007
If the refresh rate of the led is lower than the frame rate of your camera, you get flicker.

Driving modes have nothing to do with it.

Make it a science lesson for your son, but don't run him over.
This is called aliasing and has to do with sampling theory. See anything by Nyquist I'm sure you know that, just pointing it out so other people can go off and research if they care about.
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