condition	mean	min	max
4 h after light	19.7	19.7	19.7
8 h after light	5.3	4.8	5.8
12 h after light	4.8	2.3	7.3
4 h after dark	19.3	2.5	36.1
8 h after dark	1.7	1.5	1.9
12 h after dark	7.85	6.2	9.5