condition	mean	min	max
4 h after light	6.72452	3.71025	9.31625
8 h after light	7.32675	1.75665	12.5819
12 h after light	11.760346666666667	6.47284	16.1494
4 h after dark	13.93034	8.13132	18.0251
8 h after dark	19.5051	14.2114	23.481
12 h after dark	10.29459	7.22257	11.9806