condition	mean	min	max
4 h after light	1.5	1.5	1.5
8 h after light	6.45	3.0	9.9
12 h after light	8.1	6.0	10.2
4 h after dark	8.7	2.4	15.0
8 h after dark	7.3	1.1	13.5
12 h after dark	11.45	1.5	21.4