condition	mean	min	max
4 h after light	19.6	19.6	19.6
8 h after light	6.7	1.5	11.9
12 h after light	2.0	1.8	2.2
4 h after dark	4.85	1.6	8.1
8 h after dark	11.75	4.7	18.8
12 h after dark	7.95	6.9	9.0