condition mean min max 4 h after light 44.5643 40.7058 48.4228 8 h after light 38.93485 36.8922 40.9775 12 h after light 48.9886 47.4514 50.5258 4 h after dark 53.35765 53.3326 53.3827 8 h after dark 54.7727 52.3077 57.2377 12 h after dark 49.7325 49.3965 50.0685