condition	mean	min	max
4 h after light	19.0282915	17.006459	21.050124
8 h after light	17.819916	14.690528	20.949304
12 h after light	17.165725	17.165725	17.165725
4 h after dark	16.495973999999997	16.417913	16.574035
8 h after dark	17.8342675	16.404943	19.263592
12 h after dark	15.707987	15.707987	15.707987