condition	mean	min	max
4 h after light	8.468703333333332	8.30401	8.57355
8 h after light	8.46318	8.29686	8.64837
12 h after light	8.636883333333333	8.41194	8.79931
4 h after dark	8.700083333333334	8.650960000000001	8.763580000000001
8 h after dark	8.691246666666666	8.51454	8.82505
12 h after dark	8.75941	8.74131	8.78074