condition	mean	min	max
4 h after light	8.473790000000001	8.23393	8.67041
8 h after light	8.9046	8.7193	9.14818
12 h after light	9.26416	8.79808	9.510580000000001
4 h after dark	8.944266666666667	8.5861	9.16605
8 h after dark	8.63308	8.468630000000001	8.80541
12 h after dark	8.39788	8.282760000000001	8.4939