condition mean min max 4 h after light 4723.3 4723.3 4723.3 8 h after light 4516.5 4259.9 4773.1 12 h after light 3999.05 3433.9 4564.2 4 h after dark 3907.8 3187.6 4628.0 8 h after dark 5359.15 3367.6 7350.7 12 h after dark 5971.05 5594.5 6347.6