condition	mean	min	max
4 h after light	6.1	6.1	6.1
8 h after light	4.1	1.7	6.5
12 h after light	3.75	3.4	4.1
4 h after dark	2.3	1.8	2.8
8 h after dark	3.8	3.8	3.8
12 h after dark	2.1	1.0	3.2