condition	mean	min	max
4 h after light	6.1	6.1	6.1
8 h after light	6.4	3.2	9.6
12 h after light	8.55	3.8	13.3
4 h after dark	5.1	4.2	6.0
8 h after dark	7.4	6.0	8.8
12 h after dark	4.7	3.0	6.4