condition	mean	min	max
4 h after light	6.16016	5.78481	6.53551
8 h after light	7.050795	7.00994	7.09165
12 h after light	7.452065	7.40835	7.49578
4 h after dark	9.510365	9.44212	9.57861
8 h after dark	8.945975	8.28853	9.60342
12 h after dark	9.487625000000001	9.15151	9.82374