condition	mean	min	max
4 h after light	12.8	12.8	12.8
8 h after light	7.85	4.1	11.6
12 h after light	7.5	6.9	8.1
4 h after dark	7.35	5.1	9.6
8 h after dark	13.2	6.4	20.0
12 h after dark	3.9	2.8	5.0