condition	mean	min	max
0 h after light	17.684350000000002	15.951	19.4177
4 h after light	13.25545	11.8698	14.6411
8 h after light	9.156805	9.09239	9.22122
4 h after dark	22.3609	20.2149	24.5069
8 h after dark	17.865949999999998	16.4467	19.2852
12 h after dark	18.62405	16.6929	20.5552