condition	mean	min	max
4 h after light	5.5	5.5	5.5
8 h after light	4.1	4.0	4.2
12 h after light	7.3	5.6	9.0
4 h after dark	7.35	5.6	9.1
8 h after dark	5.65	5.3	6.0
12 h after dark	8.7	8.6	8.8