condition	mean	min	max
4 h after light	3.1	3.1	3.1
8 h after light	2.55	1.1	4.0
12 h after light	19.05	18.3	19.8
4 h after dark	42.1	22.3	61.9
8 h after dark	5.25	3.6	6.9
12 h after dark	34.75	18.6	50.9