condition	mean	min	max
4 h after light	3.6	3.6	3.6
8 h after light	5.1	4.5	5.7
12 h after light	8.15	4.5	11.8
4 h after dark	7.85	5.8	9.9
8 h after dark	36.4	27.3	45.5
12 h after dark	13.0	5.3	20.7