condition	mean	min	max
4 h after light	2.5	2.5	2.5
8 h after light	1.3	0.5	2.1
12 h after light	1.15	1.0	1.3
4 h after dark	2.4	1.2	3.6
8 h after dark	1.7	1.4	2.0
12 h after dark	1.3	0.8	1.8