condition	mean	min	max
4 h after light	16.97815	15.5914	18.3649
8 h after light	19.302149999999997	17.1463	21.458
12 h after light	15.4777	14.8153	16.1401
4 h after dark	20.244866666666667	17.4159	22.9962
8 h after dark	13.930266666666666	12.2127	15.1117
12 h after dark	17.5194	16.1873	19.8888