condition	mean	min	max
4 h after light	4.9	4.9	4.9
8 h after light	3.55	2.5	4.6
12 h after light	6.5	2.7	10.3
4 h after dark	18.3	3.4	33.2
8 h after dark	2.7	2.6	2.8
12 h after dark	5.9	2.8	9.0