condition	mean	min	max
4 h after light	6.3	6.3	6.3
8 h after light	6.25	5.8	6.7
12 h after light	5.15	3.3	7.0
4 h after dark	5.7	3.1	8.3
8 h after dark	11.8	9.6	14.0
12 h after dark	18.0	7.9	28.1