condition	mean	min	max
4 h after light	6.422196666666666	6.26305	6.50985
8 h after light	6.3938	6.2718	6.46186
12 h after light	6.5852	6.4715300000000004	6.78573
4 h after dark	6.25232	6.188219999999999	6.32484
8 h after dark	6.11067	5.72885	6.4169599999999996
12 h after dark	6.488143333333333	6.40522	6.54791