condition	mean	min	max
4 h after light	20.3	20.3	20.3
8 h after light	3.25	2.9	3.6
12 h after light	9.95	7.7	12.2
4 h after dark	15.2	9.9	20.5
8 h after dark	8.35	6.1	10.6
12 h after dark	14.4	11.5	17.3