condition	mean	min	max
4 h after light	15.589500000000001	15.2866	15.8924
8 h after light	7.20838	6.68676	7.73
12 h after light	3.9029249999999998	3.69073	4.11512
4 h after dark	1.19096	0.91166	1.47026
8 h after dark	2.758575	2.67057	2.84658
12 h after dark	13.018550000000001	12.8705	13.1666