condition	mean	min	max
4 h after light	2.4	2.4	2.4
8 h after light	20.65	20.0	21.3
12 h after light	4.1	3.7	4.5
4 h after dark	9.5	4.0	15.0
8 h after dark	1.95	1.5	2.4
12 h after dark	2.7	1.5	3.9