condition mean min max 4 h after light 5182.3 5182.3 5182.3 8 h after light 6229.25 6141.2 6317.3 12 h after light 6352.8 6270.6 6435.0 4 h after dark 6925.5 6396.3 7454.7 8 h after dark 7301.9 6640.5 7963.3 12 h after dark 6747.85 6054.7 7441.0