condition mean min max 4 h after light 15.85755 14.422 17.2931 8 h after light 23.67905 23.4179 23.9402 12 h after light 41.53915 38.5589 44.5194 4 h after dark 35.1546 33.7086 36.4914 8 h after dark 36.1735 31.0499 39.0154 12 h after dark 17.3924 16.157 18.3247