condition	mean	min	max
4 h after light	12.5	12.5	12.5
8 h after light	16.85	6.5	27.2
12 h after light	20.4	15.4	25.4
4 h after dark	12.7	6.5	18.9
8 h after dark	8.75	0.9	16.6
12 h after dark	10.3	5.7	14.9