condition mean min max 4 h after light 13.6306945 11.589822 15.671567 8 h after light 14.562642499999999 13.128402 15.996883 12 h after light 15.465862999999999 14.022964 16.908762 4 h after dark 15.8153 13.939905 17.690695 8 h after dark 11.9378145 11.533945 12.341684 12 h after dark 18.029798 18.029798 18.029798