condition	mean	min	max
4 h after light	18.91515	17.3673	20.463
8 h after light	7.6739999999999995	7.55792	7.79008
12 h after light	3.152335	2.8046	3.50007
4 h after dark	5.66788	4.65035	6.35986
8 h after dark	8.911973333333334	8.23881	9.75308
12 h after dark	17.016933333333334	16.8538	17.2235