condition	mean	min	max
4 h after light	15.143450000000001	14.4837	15.8032
8 h after light	9.593499999999999	9.25028	9.93672
12 h after light	8.68405	8.39564	8.97246
4 h after dark	6.844374999999999	6.35056	7.33819
8 h after dark	7.07898	7.00618	7.15178
12 h after dark	12.51695	12.1479	12.886