condition	mean	min	max
4 h after light	8.61548	8.52166	8.7152
8 h after light	8.500273333333332	8.30078	8.72592
12 h after light	8.544830000000001	8.4844	8.57818
4 h after dark	8.406843333333333	8.23122	8.558819999999999
8 h after dark	8.353293333333333	8.0713	8.56959
12 h after dark	8.450353333333332	8.33175	8.554089999999999