condition	mean	min	max
4 h after light	8.088085	7.49043	8.68574
8 h after light	9.85099	9.01578	10.6862
12 h after light	13.6229	12.6953	14.5505
4 h after dark	17.658733333333334	16.8078	18.1636
8 h after dark	16.5595	15.5421	18.2294
12 h after dark	12.616033333333334	11.4265	13.5751