condition	mean	min	max
4 h after light	8.449526666666667	7.9667699999999995	8.78242
8 h after light	8.565926666666666	8.15317	8.79016
12 h after light	8.62005	8.27961	8.93506
4 h after dark	8.429143333333332	8.09194	8.7433
8 h after dark	8.51391	8.23344	8.71257
12 h after dark	8.436639999999999	8.205219999999999	8.724789999999999