condition	mean	min	max
4 h after light	7.2	7.2	7.2
8 h after light	6.05	5.6	6.5
12 h after light	7.4	7.2	7.6
4 h after dark	8.15	6.9	9.4
8 h after dark	7.7	7.4	8.0
12 h after dark	10.45	8.8	12.1