condition	mean	min	max
4 h after light	7.393326666666667	7.3606300000000005	7.43997
8 h after light	7.198103333333334	6.923260000000001	7.40897
12 h after light	7.283613333333333	7.08477	7.50145
4 h after dark	7.12132	7.04045	7.19032
8 h after dark	7.1194766666666665	6.876289999999999	7.35602
12 h after dark	7.0906899999999995	7.00522	7.2134100000000005