condition mean min max 4 h after light 6.340475 6.34007 6.34088 8 h after light 11.05245 10.9665 11.1384 12 h after light 54.717 47.7487 61.6853 4 h after dark 38.49635 34.1265 42.8662 8 h after dark 26.0914 25.1184 27.0644 12 h after dark 15.263950000000001 14.0417 16.4862