I thought the same thing as everyone else at first but I think the idea is that the lights are already off and the kids are supposed to be going to sleep but instead they are still talking and maybe even pillow-fighting. The grown-up comes into the room and turns the light on to say "Hey, pipe down and go to sleep already!". My major complaint with the sentence (besides the fact that it's way too darn long) is that it's more likely that the grown-up will be barking "Go to sleep!" rather than whispering. Well, OK, at least that's how I would deal with the situation. I'm not often accused of being too gentle.