condition	mean	min	max
4 h after light	2.2	2.2	2.2
8 h after light	2.5	2.0	3.0
12 h after light	3.6	3.5	3.7
4 h after dark	3.95	2.7	5.2
8 h after dark	9.3	3.8	14.8
12 h after dark	4.2	4.0	4.4