condition	mean	min	max
4 h after light	20.46809	8.48207	30.653
8 h after light	16.9009	5.7864	26.8064
12 h after light	15.92107	8.40871	28.858
4 h after dark	12.61612	7.88646	14.9884
8 h after dark	14.387866666666667	10.9752	17.402
12 h after dark	14.023430000000001	8.87049	23.3759