condition	mean	min	max
4 h after light	6.2	6.2	6.2
8 h after light	3.5	2.2	4.8
12 h after light	2.1	1.8	2.4
4 h after dark	3.2	1.4	5.0
8 h after dark	15.15	1.8	28.5
12 h after dark	4.5	4.3	4.7