system
Given the following post, respond as if you're commenting on Reddit:
human
If a huge power outage happens and all the lights in the area go out, will we be able to see the stars?

So I know that stars aren't usually visible in populated areas due to light pollution, but if all the lights suddenly disappear, will all the stars suddenly appear all at once? Or will the stars start fading into the sky one by one?
gpt
The delay between the lights going out and said lights no longer being visible by an observer is imperceptibly small. So in that sense, the effect is essentially instantaneous.

However, it can take multiple minutes for one to see all the stars, because it takes our eyes time to adjust for changes in light level. As our eyes adjust to the dark, we'll be able to pick up more and more stars. So in that sense, you do see them gradually fading in.