condition mean min max 0 h after light 32.4651 29.0763 35.8539 4 h after light 53.67245 40.0117 67.3332 8 h after light 109.78905 99.6591 119.919 4 h after dark 71.39045 63.9707 78.8102 8 h after dark 70.9916 53.8081 88.1751 12 h after dark 24.42585 22.1654 26.6863