Are you sure that those lights are random? I have been trying multiple times and I am failing to find even the first one after the warning, and I have been circling the whole perimeter for around 45 minutes.You get a good half second to a full second before you get murderlised.
I'd say you stutter step all the way and have sprint always on.
The lights are all along the walls and they're random, just hug the outer walls and you'll find 'em.
The game also autosaves when you find each one I think.
I hope they change it up a bit though, it is pretty frustrating sometimes when the "thing" camps near you.