condition	mean	min	max
4 h after light	4.2	4.2	4.2
8 h after light	1.5	1.3	1.7
12 h after light	20.35	8.9	31.8
4 h after dark	16.5	8.1	24.9
8 h after dark	5.5	1.9	9.1
12 h after dark	2.9	2.3	3.5