condition mean min max 4 h after light 21.129023 16.244367 26.013679 8 h after light 16.416163 13.748756 19.08357 12 h after light 20.994538 17.165725 24.823351 4 h after dark 33.1714975 17.046054 49.296941 8 h after dark 37.365367 25.131256 49.599478 12 h after dark 48.088401 48.088401 48.088401