condition	mean	min	max
4 h after light	3.7	3.7	3.7
8 h after light	2.1	1.7	2.5
12 h after light	14.65	9.2	20.1
4 h after dark	2.35	1.6	3.1
8 h after dark	8.0	5.6	10.4
12 h after dark	2.45	1.5	3.4