condition	mean	min	max
4 h after light	19352.635	18106.01667	21185.16333
8 h after light	14461.914446666668	12263.99	17155.71667
12 h after light	10791.613331	8768.473333	13562.65333
1.5 h after dark	10443.100000999999	9315.443333	11070.38
5.5 h after dark	14601.455556666668	13589.99667	15651.56667
9.5 h after dark	15941.796666666667	14714.04	17055.56333