condition	mean	min	max
4 h after light	3.0	3.0	3.0
8 h after light	5.5	4.6	6.4
12 h after light	9.0	7.7	10.3
4 h after dark	5.3	4.5	6.1
8 h after dark	8.2	7.0	9.4
12 h after dark	7.6	6.2	9.0