condition	mean	min	max
4 h after light	6.1	6.1	6.1
8 h after light	4.05	2.4	5.7
12 h after light	8.4	2.7	14.1
4 h after dark	8.05	7.7	8.4
8 h after dark	19.35	9.7	29.0
12 h after dark	10.2	0.9	19.5