condition	mean	min	max
4 h after light	7.6	7.6	7.6
8 h after light	4.95	4.0	5.9
12 h after light	7.75	7.5	8.0
4 h after dark	9.95	9.1	10.8
8 h after dark	6.45	5.0	7.9
12 h after dark	10.65	10.4	10.9