condition	mean	min	max
4 h after light	8.49899	8.16649	8.68946
8 h after light	8.727590000000001	8.5454	9.030560000000001
12 h after light	8.790286666666667	8.3451	9.154739999999999
4 h after dark	8.901573333333333	8.50431	9.28379
8 h after dark	8.64834	8.32661	8.96692
12 h after dark	8.582183333333333	8.28387	8.81053