Sentry mode in the dark: I just looked at videos of my car in the garage at night. The cameras showed the darkness around the car. However the were some short frames showing clear images of every object as if there was light. How could it be? Does sentry mode incorrectly send images that were captured before nightfall?
I believe you are seeing the results of headlight flashing, possibly also reverse lights, upon some trigger. I'm not actually sure all these events are true Sentry incidents recorded as clips.
I do know that after dark, when I activate the Live Camera feature in the app with the car sitting in the driveway, I often see random bright flashing from the headlights and the corresponding lit-up video display in the app. Not always, and not in any really detectable pattern.
If I'm just standing outside, away from the car and
not using the remote Live Camera view, I don't see these occurrences (unless there's an obvious cause from a person or large animal approaching the car).
My guess, and that's all it is, is that the motion detection sensitivity trigger is set to a very low threshold (i.e. very sensitive) while the Live Camera view is active. I think it returns to normal (i.e. less sensitive) when you stop using the Live Camera remote viewing feature.
Why would it do this? Again a guess: it may be that the
onset of a Sentry event requires significant motion, but then for a period of time the sensitivity is increased to catch related follow-on activity more reliably. If this is true, then it's quite possible that the action of the user initiating a Live Camera session in the app, even though it wasn't initially triggered by detected motion around the car, then follows the same routine - prone to these apparently false triggerings and flashes.
I actually wish that Tesla would allow us to intentionally illuminate the headlights and reverse lights, as an optional feature while viewing, because the nighttime view can be pretty dark and useless unless you happen to get one of these random flashes. The illumination could probably be somewhat dimmed-down but steady, and would still be very useful for seeing what is going on at night. The cameras have decent night vision as long as they have
some light to work with. The illumination should remain an option, as you might sometimes want to activate the camera observation without alerting bad people or bothering good people who happen to be around the car. As it is now, it's prone to those unpredictable, non-useful and annoying flashing events when you pull up the Live Camera view.