condition	mean	min	max
4 h after light	5.9	5.9	5.9
8 h after light	8.0	2.6	13.4
12 h after light	9.0	6.4	11.6
4 h after dark	13.65	12.5	14.8
8 h after dark	3.0	1.9	4.1
12 h after dark	8.3	6.2	10.4