condition	mean	min	max
4 h after light	20.2583	18.8097	21.7069
8 h after light	10.83549	9.86248	11.8085
12 h after light	6.24685	5.72809	6.76561
4 h after dark	11.907633333333333	11.3905	12.7542
8 h after dark	15.2114	14.5654	16.0609
12 h after dark	21.310066666666668	19.7742	22.4779