condition	mean	min	max
4 h after light	3.2	3.2	3.2
8 h after light	2.3	2.0	2.6
12 h after light	2.7	2.4	3.0
4 h after dark	3.5	1.8	5.2
8 h after dark	3.1	1.3	4.9
12 h after dark	1.4	1.2	1.6