condition	mean	min	max
4 h after light	8.685286666666666	8.63075	8.784139999999999
8 h after light	8.56209	8.53176	8.60614
12 h after light	8.73957	8.65114	8.802669999999999
4 h after dark	8.57206	8.38068	8.70885
8 h after dark	8.394696666666666	8.31302	8.50521
12 h after dark	8.521316666666667	8.4189	8.67426