Confusing CT brake lights

[E90alex]

This is the best they could come up with? Let’s make the center light bar smaller when the brakes are on.

Also they went back to combined red brake/turn again after finally separating them with amber turn signals on the rest of the lineup.

https://twitter.com/x/status/1717196301715300378

 

[ThomasD]

Almost every Cybertruck picture or video I see there is something wrong with the Taillights. Either one is completely out or partially out or both are partially out.

 

[strider]

They may be testing different designs. I'm guessing they went w/ red only due to size limitations. The US is odd in that it specifies a minimum area for brake lights, not intensity like other countries. So if you make the tail light area too small, you have to use the same lights for both brake and turn signals.

 

[terranx]

That 3rd brake lamp design is atrocious. I can't imagine that actually meets the federal regs

 

[charliehorse]

I was behind a stopped CT.

 

[ThomasD]

With the Tailgate down the Third Brake Light won't be visible.

 

[mongo]

With the Tailgate down the Third Brake Light won't be visible.

That's allowable
aiam3960 | NHTSA

Having it combined with another lamp however...

 

[Twiglett]

Almost every Cybertruck picture or video I see there is something wrong with the Taillights. Either one is completely out or partially out or both are partially out.

That is a camera shutter illusion cause by the shutter being out of sync with the LEDs of the lights.

 

[ThomasD]

The center bar doesn't look lit up when the Brakes are applied. Is that from the camera shutter illusion?

 

[Big Earl]

Likely due to the extremely off-axis viewpoint in that video. I can see it, but it's faint.

 

[Twiglett]

The center bar doesn't look lit up when the Brakes are applied. Is that from the camera shutter illusion?

The point of the effects of rolling shutting type issues is that you can see it everywhere a cam area takes an image of multiple LEDs. Even LED traffic lights have the same issue.

 

[mongo]

Almost every Cybertruck picture or video I see there is something wrong with the Taillights. Either one is completely out or partially out or both are partially out.

I'm pretty sure they are turning off the tailgate taillight when they turn on the center high-mounted stop lamp (CHMSL).

In the first video, it's doing the normal one side off other side blink tail/stop combination behavior.

Shutter vs LED blink is often an issue with dimmed white LEDs. Those have color shift if driven at a different current, so they are pulsed. A red lamp with a constant brightness setting wouldn't require PWM and would have a driver circuit set to the proper current (esp on a 48V bus).
ICE cars can have a lower quality driver that compensates for alternator/ battery voltage.