condition	mean	min	max
4 h after light	6.465115	6.32533	6.6049
8 h after light	5.44261	4.98723	5.89799
12 h after light	8.34877	7.78784	8.9097
4 h after dark	12.902733333333332	11.9774	13.7092
8 h after dark	11.382	10.9343	11.6308
12 h after dark	6.83235	6.32075	7.11756