condition	mean	min	max
4 h after light	18.4172415	16.575405	20.259078
8 h after light	18.556413	18.556413	18.556413
12 h after light	16.585312	14.614211	18.556413
4 h after dark	18.774908	18.388104	19.161712
8 h after dark	17.3357485	16.115084	18.556413
12 h after dark	21.087531	21.087531	21.087531