condition mean min max 0 h after light 41.241 41.1628 41.3192 4 h after light 12.23162 9.02974 15.4335 8 h after light 19.6839 18.8008 20.567 4 h after dark 39.78165 23.3558 56.2075 8 h after dark 23.6333 23.2474 24.0192 12 h after dark 18.27435 15.2919 21.2568