condition	mean	min	max
0 h after light	8.30931	8.18592	8.4327
4 h after light	8.89875	8.73842	9.05908
8 h after light	9.306095	9.02707	9.58512
4 h after dark	11.2105	10.7354	11.6856
8 h after dark	9.80499	9.60278	10.0072
12 h after dark	9.074745	9.00679	9.1427