condition	mean	min	max
4 h after light	7.871486666666667	7.52751	8.164439999999999
8 h after light	7.57711	7.40623	7.71489
12 h after light	7.418363333333333	7.248239999999999	7.5990899999999995
4 h after dark	8.204526666666666	7.978110000000001	8.48555
8 h after dark	8.62011	8.32432	8.96033
12 h after dark	8.849873333333333	8.59685	9.015039999999999