condition mean min max 4 h after light 12.554526666666668 6.94078 17.6275 8 h after light 16.534433333333332 4.7904 26.2999 12 h after light 17.842219999999998 9.24706 27.9894 4 h after dark 21.6994 13.8407 28.838 8 h after dark 17.7521 13.3099 20.2417 12 h after dark 16.170566666666666 14.1571 17.2042