condition	mean	min	max
4 h after light	4.234006666666667	4.1549	4.36183
8 h after light	4.2498	4.13433	4.31347
12 h after light	4.11489	4.049930000000001	4.16676
4 h after dark	4.2967699999999995	4.20512	4.466819999999999
8 h after dark	4.20795	4.18807	4.217980000000001
12 h after dark	4.26835	4.08933	4.585719999999999