condition	mean	min	max
4 h after light	5.5	5.5	5.5
8 h after light	6.9	5.9	7.9
12 h after light	8.6	4.0	13.2
4 h after dark	8.5	7.9	9.1
8 h after dark	9.25	8.1	10.4
12 h after dark	6.55	5.1	8.0