condition	mean	min	max
4 h after light	5.631735	5.32062	5.94285
8 h after light	11.65845	11.3771	11.9398
12 h after light	17.1921	16.1483	18.2359
4 h after dark	9.174573333333333	8.56522	9.5502
8 h after dark	9.24399	8.92359	9.65132
12 h after dark	6.713666666666667	5.81482	7.18829