condition mean min max 0 h after light 19.75515 19.5242 19.9861 4 h after light 13.51065 12.8571 14.1642 8 h after light 17.4226 15.3181 19.5271 4 h after dark 19.293 17.2755 21.3105 8 h after dark 16.526200000000003 16.3426 16.7098 12 h after dark 14.4298 13.5762 15.2834