condition mean min max 0 h after light 0.8755305 0.825194 0.925867 4 h after light 0.877653 0.813597 0.941709 8 h after light 1.38949 1.2768 1.50218 4 h after dark 1.087856 0.943832 1.23188 8 h after dark 1.158163 0.983476 1.33285 12 h after dark 0.701534 0.644909 0.758159