condition	mean	min	max
4 h after light	1.1	1.1	1.1
8 h after light	3.25	3.0	3.5
12 h after light	3.9	3.5	4.3
4 h after dark	4.0	2.3	5.7
8 h after dark	1.3	0.9	1.7
12 h after dark	2.05	1.7	2.4