condition	mean	min	max
4 h after light	2.0	2.0	2.0
8 h after light	11.05	0.8	21.3
12 h after light	2.05	1.6	2.5
4 h after dark	1.75	1.5	2.0
8 h after dark	2.5	1.5	3.5
12 h after dark	2.2	1.3	3.1