condition	mean	min	max
4 h after light	6.8	6.8	6.8
8 h after light	18.65	9.7	27.6
12 h after light	8.2	6.9	9.5
4 h after dark	18.45	9.7	27.2
8 h after dark	6.75	5.2	8.3
12 h after dark	9.15	2.8	15.5