My girls go to 'bed' immediately after sunset. Right now they are on their roost at 8pm give or take no more than 5 mins. Last night was interesting, it was pouring here in Western Massachusetts but I like to let my girls out of their run every day for at least an hour before their bedtime. So, because of the rain they were mostly hanging around with me in the garage (4 out of the six were sitting on me). I noticed it was around 8pm and they had not gone to their coop which they normally do like clockwork. Then I realized it was probably because the light was on in the garage. The instant I turned the light off they immediately marched into their run, into their coop and up onto their roost. It was so funny to watch.