condition mean min max 0 h after light 186.337 170.644 202.03 4 h after light 278.764 213.39 344.138 8 h after light 523.865 418.471 629.259 4 h after dark 532.274 470.352 594.196 8 h after dark 358.807 317.027 400.587 12 h after dark 269.718 240.129 299.307