condition	mean	min	max
4 h after light	8.760476666666667	8.6761	8.84425
8 h after light	8.764326666666667	8.61696	8.91127
12 h after light	8.697560000000001	8.63139	8.802810000000001
4 h after dark	8.36243	8.23957	8.447330000000001
8 h after dark	8.110893333333333	7.965110000000001	8.190489999999999
12 h after dark	8.282856666666667	7.92098	8.764380000000001