condition mean min max 0 h after light 3.34382 3.30393 3.38371 4 h after light 4.625795 4.0151 5.23649 8 h after light 6.01645 5.97321 6.05969 4 h after dark 4.699195 4.47664 4.92175 8 h after dark 3.491725 2.76506 4.21839 12 h after dark 3.49855 2.35258 4.64452