condition	mean	min	max
4 h after light	3.6	3.6	3.6
8 h after light	18.15	3.3	33.0
12 h after light	9.8	4.4	15.2
4 h after dark	15.8	4.3	27.3
8 h after dark	7.7	6.4	9.0
12 h after dark	10.75	4.9	16.6