condition mean min max 4 h after light 481.7 481.7 481.7 8 h after light 471.35 386.2 556.5 12 h after light 1581.4 481.4 2681.4 4 h after dark 1283.9 423.9 2143.9 8 h after dark 659.1 560.1 758.1 12 h after dark 529.65 477.2 582.1