condition	mean	min	max
4 h after light	2.3	2.3	2.3
8 h after light	3.9	3.5	4.3
12 h after light	1.05	0.5	1.6
4 h after dark	1.7	1.1	2.3
8 h after dark	1.35	1.3	1.4
12 h after dark	1.65	1.3	2.0