condition	mean	min	max
4 h after light	1.7	1.7	1.7
8 h after light	2.25	2.0	2.5
12 h after light	1.75	1.3	2.2
4 h after dark	3.4	2.7	4.1
8 h after dark	2.95	2.4	3.5
12 h after dark	2.3	2.2	2.4