condition	mean	min	max
4 h after light	18.9	18.9	18.9
8 h after light	75.35	63.0	87.7
12 h after light	63.5	62.1	64.9
4 h after dark	60.95	41.4	80.5
8 h after dark	55.25	52.0	58.5
12 h after dark	59.8	54.4	65.2