condition mean min max 4 h after light 8.67066 8.54747 8.88543 8 h after light 8.77584 8.71795 8.87768 12 h after light 9.179523333333334 9.06834 9.2667 4 h after dark 9.84298 9.68667 9.95531 8 h after dark 9.59467 9.33292 9.78156 12 h after dark 9.63312 9.220930000000001 10.00295