condition	mean	min	max
4 h after light	6.12862	6.10159	6.1645199999999996
8 h after light	6.368176666666667	6.2984800000000005	6.41821
12 h after light	6.248046666666666	6.20032	6.28904
4 h after dark	6.30246	6.25407	6.33139
8 h after dark	6.3345666666666665	6.27334	6.39375
12 h after dark	6.23275	6.13526	6.3091099999999996