condition	mean	min	max
4 h after light	6.0	6.0	6.0
8 h after light	6.9	4.5	9.3
12 h after light	7.05	6.0	8.1
4 h after dark	7.7	5.0	10.4
8 h after dark	10.75	7.5	14.0
12 h after dark	6.95	6.9	7.0