condition	mean	min	max
4 h after light	1.8	1.8	1.8
8 h after light	4.1	2.2	6.0
12 h after light	7.55	2.1	13.0
4 h after dark	23.7	20.7	26.7
8 h after dark	9.7	9.6	9.8
12 h after dark	9.4	0.3	18.5