condition mean min max 4 h after light 10.235345 9.98149 10.4892 8 h after light 12.05495 11.5868 12.5231 12 h after light 20.86405 19.2021 22.526 4 h after dark 28.430366666666668 27.1048 29.732 8 h after dark 21.9104 20.231 24.1179 12 h after dark 17.397133333333336 15.6027 20.0483