condition	mean	min	max
4 h after light	11.3	11.3	11.3
8 h after light	4.0	3.7	4.3
12 h after light	8.5	7.8	9.2
4 h after dark	7.75	7.3	8.2
8 h after dark	15.5	6.8	24.2
12 h after dark	4.85	3.9	5.8