condition	mean	min	max
4 h after light	1.5	1.5	1.5
8 h after light	2.85	2.0	3.7
12 h after light	20.65	18.5	22.8
4 h after dark	7.1	6.9	7.3
8 h after dark	4.4	3.2	5.6
12 h after dark	48.1	35.6	60.6