condition	mean	min	max
4 h after light	7.162777777666666	6.825	7.643333333
8 h after light	6.847222222333333	6.24	7.155
12 h after light	5.547777778	3.836666667	7.89
1.5 h after dark	5.192222222333333	3.42	8.03
5.5 h after dark	5.1511111110000005	2.6	6.79
9.5 h after dark	7.618888889	6.1	8.76