condition	mean	min	max
4 h after light	8.698453333333333	8.42583	9.17977
8 h after light	8.41086	7.976139999999999	9.085980000000001
12 h after light	9.25981	8.9325	9.911710000000001
4 h after dark	8.664200000000001	8.09126	9.51553
8 h after dark	8.741353333333333	8.695789999999999	8.82766
12 h after dark	7.908853333333333	7.47302	8.227039999999999