condition	mean	min	max
4 h after light	4.9	4.9	4.9
8 h after light	1.85	1.5	2.2
12 h after light	3.7	3.7	3.7
4 h after dark	5.1	1.1	9.1
8 h after dark	18.35	15.0	21.7
12 h after dark	15.75	11.0	20.5