condition	mean	min	max
4 h after light	8.781563333333334	8.31357	9.06122
8 h after light	8.75653	8.08422	9.19694
12 h after light	8.72864	8.20739	9.08275
4 h after dark	8.37075	7.963239999999999	8.63457
8 h after dark	8.119966666666667	7.78292	8.350439999999999
12 h after dark	8.32615	7.98065	8.674