condition	mean	min	max
4 h after light	13.5	13.5	13.5
8 h after light	9.0	8.1	9.9
12 h after light	8.75	2.4	15.1
4 h after dark	1.55	0.9	2.2
8 h after dark	2.3	1.6	3.0
12 h after dark	1.65	0.8	2.5