condition	mean	min	max
4 h after light	1.3	1.3	1.3
8 h after light	6.1	5.4	6.8
12 h after light	3.25	3.1	3.4
4 h after dark	13.25	5.3	21.2
8 h after dark	5.35	4.5	6.2
12 h after dark	3.15	1.0	5.3