condition mean min max 4 h after light 6065.124444666667 4252.956667 7183.68 8 h after light 5012.54 3834.38 6274.84 12 h after light 4808.695555666667 4327.47 5635.616667 1.5 h after dark 5937.993333666666 4012.686667 7143.456667 5.5 h after dark 7959.068889 5960.36 11109.19 9.5 h after dark 6775.351111 4377.783333 9053.153333