condition	mean	min	max
0 h after light	8.7092	8.39881	9.01959
4 h after light	7.77442	7.5993	7.94954
8 h after light	6.43863	6.42921	6.44805
4 h after dark	8.630425	7.72079	9.54006
8 h after dark	8.074755	7.87474	8.27477
12 h after dark	8.830795	8.40175	9.25984