condition	mean	min	max
4 h after light	6.7	6.7	6.7
8 h after light	7.15	4.2	10.1
12 h after light	5.2	4.2	6.2
4 h after dark	5.35	4.3	6.4
8 h after dark	4.8	4.0	5.6
12 h after dark	5.75	4.2	7.3