condition	mean	min	max
4 h after light	8.244083333333332	8.03848	8.52708
8 h after light	8.49202	8.220139999999999	8.97812
12 h after light	8.5993	8.331669999999999	9.05995
4 h after dark	8.217573333333334	7.92594	8.637319999999999
8 h after dark	8.119233333333334	7.84098	8.54439
12 h after dark	8.351646666666666	7.996169999999999	8.78973