Call it what you want Mil, sleep or rest, but they don't swim around the tank all night. Perhaps some fish do (they're called nocturnal), but in your prior post you said "your" (as in my) fish are moving all night. If your fish are staying active all night, perhaps you are having the same dumbfounding problems yourself. They absolutely are disoriented when coming out of whatever you wish to call their resting state, and it's not "startled" when only a room lamp is turned on. As I already stated, they start moving around slowly and bumping into things. Being startled results in quick movements. I have enough common sense to recognize a startled creature when I see one. If you're going to come along and talk to people like they're stupid, know what you're talking about first, please sir, and welcome to ignore. Your first 2 posts ever were here in this thread to toss inaccuracies around as facts and talk down to people for discussing something. You've already gotten off on the wrong foot, and if this is how you communicate on forums, you've come to the wrong one.
And getting back on track, when I woke up this morning, I found most of my fish resting. Oddly, I have a big cave in there and none go in there to do their resting. I think they're going to rest more, and it's just a matter of getting use to the new lighting.