condition mean min max 4 h after light 6887.1866666666665 5474.51 7917.34 8 h after light 5931.386666666666 2839.39 8471.46 12 h after light 2601.26 1865.26 3839.53 4 h after dark 146.11316666666667 98.5185 212.173 8 h after dark 270.536 237.291 323.176 12 h after dark 3371.77 2381.53 4184.07