condition mean min max 4 h after light 12.26975 10.9563 13.5832 8 h after light 20.93445 20.319 21.5499 12 h after light 24.4175 23.6785 25.1565 4 h after dark 27.5834 24.308 32.6634 8 h after dark 18.405866666666668 18.2929 18.5652 12 h after dark 15.2496 13.1101 18.3566