condition	mean	min	max
4 h after light	9.1	9.1	9.1
8 h after light	7.4	6.8	8.0
12 h after light	9.45	9.0	9.9
4 h after dark	7.95	7.6	8.3
8 h after dark	21.25	3.9	38.6
12 h after dark	6.95	4.0	9.9