condition	mean	min	max
4 h after light	1.0	1.0	1.0
8 h after light	6.45	3.1	9.8
12 h after light	14.6	9.5	19.7
4 h after dark	10.700000000000001	2.6	18.8
8 h after dark	10.35	10.1	10.6
12 h after dark	18.25	16.4	20.1